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SELECT * FROM `help_topic`
Textes complets help_topic_id name help_category_id description example url
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 0
0 HELP_DATE 1 This help information was generated from the MySQL...
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 1
1 HELP_VERSION 1 This help information was generated from the MySQL...
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 2
2 AUTO_INCREMENT 2 The AUTO_INCREMENT attribute can be used to genera...
CREATE TABLE animals (
     id MEDIUMINT NOT NULL ...
https://dev.mysql.com/doc/refman/8.1/en/example-auto-increment.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 3
3 HELP COMMAND 3 Syntax:
mysql> help search_string

If you provide ...
https://dev.mysql.com/doc/refman/8.1/en/mysql-server-side-help.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 4
4 ASYMMETRIC_DECRYPT 5 Syntax:
asymmetric_decrypt(algorithm, data_str, pr...
https://dev.mysql.com/doc/refman/8.1/en/enterprise-encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 5
5 ASYMMETRIC_ENCRYPT 5 Syntax:
asymmetric_encrypt(algorithm, data_str, pu...
-- Generate private/public key pair
SET @priv = cr...
https://dev.mysql.com/doc/refman/8.1/en/enterprise-encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 6
6 ASYMMETRIC_SIGN 5 Syntax:
asymmetric_sign(algorithm, text, priv_key_...
https://dev.mysql.com/doc/refman/8.1/en/enterprise-encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 7
7 ASYMMETRIC_VERIFY 5 Syntax:
asymmetric_verify(algorithm, text, sig_str...
-- Set the encryption algorithm and digest type
SE...
https://dev.mysql.com/doc/refman/8.1/en/enterprise-encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 8
8 CREATE_ASYMMETRIC_PRIV_KEY 5 Syntax:
create_asymmetric_priv_key(algorithm, key_...
SET @priv = create_asymmetric_priv_key('RSA', 2048...
https://dev.mysql.com/doc/refman/8.1/en/enterprise-encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 9
9 CREATE_ASYMMETRIC_PUB_KEY 5 Syntax:
create_asymmetric_pub_key(algorithm, priv_...
https://dev.mysql.com/doc/refman/8.1/en/enterprise-encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 10
10 CREATE_DIGEST 5 Syntax:
create_digest(digest_type, str)

Creates a...
SET @dig = create_digest('SHA512', 'The quick brow...
https://dev.mysql.com/doc/refman/8.1/en/enterprise-encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 11
11 ASYMMETRIC_DERIVE 5 Syntax:
asymmetric_derive(pub_key_str, priv_key_st...
-- Generate DH shared symmetric secret
SET @dhp = ...
https://dev.mysql.com/doc/refman/8.1/en/enterprise-encryption-functions-legacy.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 12
12 CREATE_DH_PARAMETERS 5 create_dh_parameters(key_len)

Creates a shared se...
SET @dhp = create_dh_parameters(1024);

https://dev.mysql.com/doc/refman/8.1/en/enterprise-encryption-functions-legacy.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 13
13 TRUE 6 The constants TRUE and FALSE evaluate to 1 and 0, ... https://dev.mysql.com/doc/refman/8.1/en/boolean-literals.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 14
14 FALSE 6 The constants TRUE and FALSE evaluate to 1 and 0, ... https://dev.mysql.com/doc/refman/8.1/en/boolean-literals.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 15
15 BIT 2 BIT[(M)]

A bit-value type. M indicates the number...
https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 16
16 TINYINT 2 TINYINT[(M)] [UNSIGNED] [ZEROFILL]

A very small i...
https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 17
17 BOOLEAN 2 BOOL, BOOLEAN

These types are synonyms for TINYIN...
https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 18
18 SMALLINT 2 SMALLINT[(M)] [UNSIGNED] [ZEROFILL]

A small integ...
https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 19
19 MEDIUMINT 2 MEDIUMINT[(M)] [UNSIGNED] [ZEROFILL]

A medium-siz...
https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 20
20 INT 2 INT[(M)] [UNSIGNED] [ZEROFILL]

A normal-size inte...
https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 21
21 INTEGER 2 INTEGER[(M)] [UNSIGNED] [ZEROFILL]

This type is a...
https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 22
22 BIGINT 2 BIGINT[(M)] [UNSIGNED] [ZEROFILL]

A large integer...
https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 23
23 DECIMAL 2 DECIMAL[(M[,D])] [UNSIGNED] [ZEROFILL]

A packed "...
https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 24
24 DEC 2 DEC[(M[,D])] [UNSIGNED] [ZEROFILL], NUMERIC[(M[,D]... https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 25
25 FLOAT 2 FLOAT[(M,D)] [UNSIGNED] [ZEROFILL]

A small (singl...
https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 26
26 DOUBLE 2 DOUBLE[(M,D)] [UNSIGNED] [ZEROFILL]

A normal-size...
https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 27
27 DOUBLE PRECISION 2 DOUBLE PRECISION[(M,D)] [UNSIGNED] [ZEROFILL], REA... https://dev.mysql.com/doc/refman/8.1/en/numeric-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 28
28 DATE 2 DATE

A date. The supported range is '1000-01-01' ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 29
29 DATETIME 2 DATETIME[(fsp)]

A date and time combination. The ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 30
30 TIMESTAMP 2 TIMESTAMP[(fsp)]

A timestamp. The range is '1970-...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 31
31 TIME 2 TIME[(fsp)]

A time. The range is '-838:59:59.0000...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 32
32 YEAR DATA TYPE 2 YEAR[(4)]

A year in 4-digit format. MySQL display...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 33
33 CHAR 2 [NATIONAL] CHAR[(M)] [CHARACTER SET charset_name] ... https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 34
34 CHAR BYTE 2 The CHAR BYTE data type is an alias for the BINARY... https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 35
35 VARCHAR 2 [NATIONAL] VARCHAR(M) [CHARACTER SET charset_name]... https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 36
36 BINARY 2 BINARY[(M)]

The BINARY type is similar to the CHA...
https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 37
37 VARBINARY 2 VARBINARY(M)

The VARBINARY type is similar to the...
https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 38
38 TINYBLOB 2 TINYBLOB

A BLOB column with a maximum length of 2...
https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 39
39 TINYTEXT 2 TINYTEXT [CHARACTER SET charset_name] [COLLATE col... https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 40
40 BLOB 2 BLOB[(M)]

A BLOB column with a maximum length of ...
https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 41
41 TEXT 2 TEXT[(M)] [CHARACTER SET charset_name] [COLLATE co... https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 42
42 MEDIUMBLOB 2 MEDIUMBLOB

A BLOB column with a maximum length of...
https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 43
43 MEDIUMTEXT 2 MEDIUMTEXT [CHARACTER SET charset_name] [COLLATE c... https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 44
44 LONGBLOB 2 LONGBLOB

A BLOB column with a maximum length of 4...
https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 45
45 LONGTEXT 2 LONGTEXT [CHARACTER SET charset_name] [COLLATE col... https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 46
46 ENUM 2 ENUM('value1','value2',...) [CHARACTER SET charset... https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 47
47 SET DATA TYPE 2 SET('value1','value2',...) [CHARACTER SET charset_... https://dev.mysql.com/doc/refman/8.1/en/string-type-syntax.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 48
48 BLOB DATA TYPE 2 A BLOB is a binary large object that can hold a va... https://dev.mysql.com/doc/refman/8.1/en/blob.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 49
49 GEOMETRY HIERARCHY 7 Geometry is the base class. It is an abstract clas... https://dev.mysql.com/doc/refman/8.1/en/gis-geometry-class-hierarchy.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 50
50 MBR DEFINITION 8 Its MBR (minimum bounding rectangle), or envelope....
((MINX MINY, MAXX MINY, MAXX MAXY, MINX MAXY, MINX...
https://dev.mysql.com/doc/refman/8.1/en/gis-class-geometry.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 51
51 WKT DEFINITION 9 The Well-Known Text (WKT) representation of geomet... https://dev.mysql.com/doc/refman/8.1/en/gis-data-formats.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 52
52 SPATIAL COLUMNS 7 MySQL provides a standard way of creating spatial ...
CREATE TABLE geom (g GEOMETRY);

https://dev.mysql.com/doc/refman/8.1/en/creating-spatial-columns.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 53
53 SPATIAL INDEXES 7 For InnoDB and MyISAM tables, MySQL can create spa... https://dev.mysql.com/doc/refman/8.1/en/creating-spatial-indexes.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 54
54 = 10 =

Equal:

URL: https://dev.mysql.com/doc/refman/8...
mysql> SELECT 1 = 0;
        -> 0
mysql> SELECT '0...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 55
55 <=> 10 Syntax:
<=>

NULL-safe equal. This operator perfor...
mysql> SELECT 1 <=> 1, NULL <=> NULL, 1 <=> NULL;
...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 56
56 != 10 Syntax:
<>, !=

Not equal:

URL: https://dev.mysql...
mysql> SELECT '.01' <> '0.01';
        -> 1
mysql>...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 57
57 <= 10 Syntax:
<=

Less than or equal:

URL: https://dev....
mysql> SELECT 0.1 <= 2;
        -> 1

https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 58
58 < 10 Syntax:
<

Less than:

URL: https://dev.mysql.com/...
mysql> SELECT 2 < 2;
        -> 0

https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 59
59 >= 10 Syntax:
>=

Greater than or equal:

URL: https://d...
mysql> SELECT 2 >= 2;
        -> 1

https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 60
60 > 10 Syntax:
>

Greater than:

URL: https://dev.mysql.c...
mysql> SELECT 2 > 2;
        -> 0

https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 61
61 BETWEEN AND 10 Syntax:
expr BETWEEN min AND max

If expr is great...
mysql> SELECT 2 BETWEEN 1 AND 3, 2 BETWEEN 3 and 1...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 62
62 NOT BETWEEN 10 Syntax:
expr NOT BETWEEN min AND max

This is the ...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 63
63 COALESCE 10 Syntax:
COALESCE(value,...)

Returns the first non...
mysql> SELECT COALESCE(NULL,1);
        -> 1
mysql...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 64
64 GREATEST 10 Syntax:
GREATEST(value1,value2,...)

With two or m...
mysql> SELECT GREATEST(2,0);
        -> 2
mysql> S...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 65
65 IN 10 Syntax:
expr IN (value,...)

Returns 1 (true) if e...
mysql> SELECT 2 IN (0,3,5,7);
        -> 0
mysql> ...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 66
66 NOT IN 10 Syntax:
expr NOT IN (value,...)

This is the same ...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 67
67 INTERVAL 10 Syntax:
INTERVAL(N,N1,N2,N3,...)

Returns 0 if N <...
mysql> SELECT INTERVAL(23, 1, 15, 17, 30, 44, 200)...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 68
68 IS 10 Syntax:
IS boolean_value

Tests a value against a ...
mysql> SELECT 1 IS TRUE, 0 IS FALSE, NULL IS UNKNO...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 69
69 IS NOT 10 Syntax:
IS NOT boolean_value

Tests a value agains...
mysql> SELECT 1 IS NOT UNKNOWN, 0 IS NOT UNKNOWN, ...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 70
70 IS NULL 10 Syntax:
IS NULL

Tests whether a value is NULL.

U...
mysql> SELECT 1 IS NULL, 0 IS NULL, NULL IS NULL;
...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 71
71 IS NOT NULL 10 Syntax:
IS NOT NULL

Tests whether a value is not ...
mysql> SELECT 1 IS NOT NULL, 0 IS NOT NULL, NULL I...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 72
72 ISNULL 10 Syntax:
ISNULL(expr)

If expr is NULL, ISNULL() re...
mysql> SELECT ISNULL(1+1);
        -> 0
mysql> SEL...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 73
73 LEAST 10 Syntax:
LEAST(value1,value2,...)

With two or more...
mysql> SELECT LEAST(2,0);
        -> 0
mysql> SELE...
https://dev.mysql.com/doc/refman/8.1/en/comparison-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 74
74 ! 11 Syntax:
NOT, !

Logical NOT. Evaluates to 1 if the...
mysql> SELECT NOT 10;
        -> 0
mysql> SELECT N...
https://dev.mysql.com/doc/refman/8.1/en/logical-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 75
75 AND 11 Syntax:
AND, &&

Logical AND. Evaluates to 1 if al...
mysql> SELECT 1 AND 1;
        -> 1
mysql> SELECT ...
https://dev.mysql.com/doc/refman/8.1/en/logical-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 76
76 OR 11 Syntax:
OR, ||

Logical OR. When both operands are...
mysql> SELECT 1 OR 1;
        -> 1
mysql> SELECT 1...
https://dev.mysql.com/doc/refman/8.1/en/logical-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 77
77 XOR 11 Syntax:
XOR

Logical XOR. Returns NULL if either o...
mysql> SELECT 1 XOR 1;
        -> 0
mysql> SELECT ...
https://dev.mysql.com/doc/refman/8.1/en/logical-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 78
78 ASSIGN-VALUE 11 Syntax:
:=

Assignment operator. Causes the user v...
mysql> SELECT @var1, @var2;
        -> NULL, NULL
...
https://dev.mysql.com/doc/refman/8.1/en/assignment-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 79
79 ASSIGN-EQUAL 11 Syntax:
=

This operator is used to perform value ...
mysql> SELECT @var1, @var2;
        -> NULL, NULL
...
https://dev.mysql.com/doc/refman/8.1/en/assignment-operators.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 80
80 CASE OPERATOR 12 Syntax:
CASE value WHEN compare_value THEN result ...
mysql> SELECT CASE 1 WHEN 1 THEN 'one'
    ->     ...
https://dev.mysql.com/doc/refman/8.1/en/flow-control-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 81
81 IF FUNCTION 12 Syntax:
IF(expr1,expr2,expr3)

If expr1 is TRUE (e...
mysql> SELECT IF(1>2,2,3);
        -> 3
mysql> SEL...
https://dev.mysql.com/doc/refman/8.1/en/flow-control-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 82
82 IFNULL 12 Syntax:
IFNULL(expr1,expr2)

If expr1 is not NULL,...
mysql> SELECT IFNULL(1,0);
        -> 1
mysql> SEL...
https://dev.mysql.com/doc/refman/8.1/en/flow-control-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 83
83 NULLIF 12 Syntax:
NULLIF(expr1,expr2)

Returns NULL if expr1...
mysql> SELECT NULLIF(1,1);
        -> NULL
mysql> ...
https://dev.mysql.com/doc/refman/8.1/en/flow-control-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 84
84 + 13 Syntax:
+

Addition:

URL: https://dev.mysql.com/d...
mysql> SELECT 3+5;
        -> 8

https://dev.mysql.com/doc/refman/8.1/en/arithmetic-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 85
85 - BINARY 13 Syntax:
-

Subtraction:

URL: https://dev.mysql.co...
mysql> SELECT 3-5;
        -> -2

https://dev.mysql.com/doc/refman/8.1/en/arithmetic-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 86
86 - UNARY 13 Syntax:
-

Unary minus. This operator changes the ...
mysql> SELECT - 2;
        -> -2

https://dev.mysql.com/doc/refman/8.1/en/arithmetic-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 87
87 * 13 Syntax:
*

Multiplication:

URL: https://dev.mysql...
mysql> SELECT 3*5;
        -> 15
mysql> SELECT 180...
https://dev.mysql.com/doc/refman/8.1/en/arithmetic-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 88
88 / 13 Syntax:
/

Division:

URL: https://dev.mysql.com/d...
mysql> SELECT 3/5;
        -> 0.60

https://dev.mysql.com/doc/refman/8.1/en/arithmetic-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 89
89 DIV 13 Syntax:
DIV

Integer division. Discards from the d...
mysql> SELECT 5 DIV 2, -5 DIV 2, 5 DIV -2, -5 DIV ...
https://dev.mysql.com/doc/refman/8.1/en/arithmetic-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 90
90 % 13 Syntax:
N % M, N MOD M

Modulo operation. Returns ...
https://dev.mysql.com/doc/refman/8.1/en/arithmetic-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 91
91 ABS 13 Syntax:
ABS(X)

Returns the absolute value of X, o...
mysql> SELECT ABS(2);
        -> 2
mysql> SELECT A...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 92
92 ACOS 13 Syntax:
ACOS(X)

Returns the arc cosine of X, that...
mysql> SELECT ACOS(1);
        -> 0
mysql> SELECT ...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 93
93 ASIN 13 Syntax:
ASIN(X)

Returns the arc sine of X, that i...
mysql> SELECT ASIN(0.2);
        -> 0.201357920790...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 94
94 ATAN 13 Syntax:
ATAN(X)

Returns the arc tangent of X, tha...
mysql> SELECT ATAN(2);
        -> 1.1071487177941
...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 95
95 ATAN2 13 Syntax:
ATAN(Y,X), ATAN2(Y,X)

Returns the arc tan...
mysql> SELECT ATAN(-2,2);
        -> -0.7853981633...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 96
96 CEIL 13 Syntax:
CEIL(X)

CEIL() is a synonym for CEILING()...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 97
97 CEILING 13 Syntax:
CEILING(X)

Returns the smallest integer v...
mysql> SELECT CEILING(1.23);
        -> 2
mysql> S...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 98
98 CONV 13 Syntax:
CONV(N,from_base,to_base)

Converts number...
mysql> SELECT CONV('a',16,2);
        -> '1010'
my...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 99
99 COS 13 Syntax:
COS(X)

Returns the cosine of X, where X i...
mysql> SELECT COS(PI());
        -> -1

https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
  help_topic_id name help_category_id description example url  
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 100
100 COT 13 Syntax:
COT(X)

Returns the cotangent of X. Return...
mysql> SELECT COT(12);
        -> -1.5726734063977...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 101
101 CRC32 13 Syntax:
CRC32(expr)

Computes a cyclic redundancy ...
mysql> SELECT CRC32('MySQL');
        -> 325939755...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 102
102 DEGREES 13 Syntax:
DEGREES(X)

Returns the argument X, conver...
mysql> SELECT DEGREES(PI());
        -> 180
mysql>...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 103
103 EXP 13 Syntax:
EXP(X)

Returns the value of e (the base o...
mysql> SELECT EXP(2);
        -> 7.3890560989307
m...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 104
104 FLOOR 13 Syntax:
FLOOR(X)

Returns the largest integer valu...
mysql> SELECT FLOOR(1.23), FLOOR(-1.23);
        -...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 105
105 LN 13 Syntax:
LN(X)

Returns the natural logarithm of X;...
mysql> SELECT LN(2);
        -> 0.69314718055995
m...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 106
106 LOG 13 Syntax:
LOG(X), LOG(B,X)

If called with one param...
mysql> SELECT LOG(2);
        -> 0.69314718055995
...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 107
107 LOG2 13 Syntax:
LOG2(X)

Returns the base-2 logarithm of X...
mysql> SELECT LOG2(65536);
        -> 16
mysql> SE...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 108
108 LOG10 13 Syntax:
LOG10(X)

Returns the base-10 logarithm of...
mysql> SELECT LOG10(2);
        -> 0.3010299956639...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 109
109 MOD 13 Syntax:
MOD(N,M), N % M, N MOD M

Modulo operation...
mysql> SELECT MOD(234, 10);
        -> 4
mysql> SE...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 110
110 PI 13 Syntax:
PI()

Returns the value of π (pi). The def...
mysql> SELECT PI();
        -> 3.141593
mysql> SEL...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 111
111 POW 13 Syntax:
POW(X,Y)

Returns the value of X raised to...
mysql> SELECT POW(2,2);
        -> 4
mysql> SELECT...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 112
112 POWER 13 Syntax:
POWER(X,Y)

This is a synonym for POW().

...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 113
113 RADIANS 13 Syntax:
RADIANS(X)

Returns the argument X, conver...
mysql> SELECT RADIANS(90);
        -> 1.5707963267...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 114
114 RAND 13 Syntax:
RAND([N])

Returns a random floating-point...
mysql> CREATE TABLE t (i INT);
Query OK, 0 rows af...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 115
115 ROUND 13 Syntax:
ROUND(X), ROUND(X,D)

Rounds the argument ...
mysql> SELECT ROUND(-1.23);
        -> -1
mysql> S...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 116
116 SIGN 13 Syntax:
SIGN(X)

Returns the sign of the argument ...
mysql> SELECT SIGN(-32);
        -> -1
mysql> SELE...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 117
117 SIN 13 Syntax:
SIN(X)

Returns the sine of X, where X is ...
mysql> SELECT SIN(PI());
        -> 1.224606353822...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 118
118 SQRT 13 Syntax:
SQRT(X)

Returns the square root of a nonn...
mysql> SELECT SQRT(4);
        -> 2
mysql> SELECT ...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 119
119 TAN 13 Syntax:
TAN(X)

Returns the tangent of X, where X ...
mysql> SELECT TAN(PI());
        -> -1.22460635382...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 120
120 TRUNCATE 13 Syntax:
TRUNCATE(X,D)

Returns the number X, trunc...
mysql> SELECT TRUNCATE(1.223,1);
        -> 1.2
my...
https://dev.mysql.com/doc/refman/8.1/en/mathematical-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 121
121 ADDDATE 14 Syntax:
ADDDATE(date,INTERVAL expr unit), ADDDATE(...
mysql> SELECT ADDDATE('2008-01-02', 31);
        -...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 122
122 ADDTIME 14 Syntax:
ADDTIME(expr1,expr2)

ADDTIME() adds expr2...
mysql> SELECT ADDTIME('2007-12-31 23:59:59.999999'...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 123
123 CONVERT_TZ 14 Syntax:
CONVERT_TZ(dt,from_tz,to_tz)

CONVERT_TZ()...
mysql> SELECT CONVERT_TZ('2004-01-01 12:00:00','GM...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 124
124 CURDATE 14 Syntax:
CURDATE()

Returns the current date as a v...
mysql> SELECT CURDATE();
        -> '2008-06-13'
m...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 125
125 CURRENT_DATE 14 Syntax:
CURRENT_DATE, CURRENT_DATE()

CURRENT_DATE...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 126
126 CURRENT_TIME 14 Syntax:
CURRENT_TIME, CURRENT_TIME([fsp])

CURRENT...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 127
127 CURRENT_TIMESTAMP 14 Syntax:
CURRENT_TIMESTAMP, CURRENT_TIMESTAMP([fsp]...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 128
128 CURTIME 14 Syntax:
CURTIME([fsp])

Returns the current time a...
mysql> SELECT CURTIME();
+-----------+
| CURTIME()...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 129
129 DATE FUNCTION 14 Syntax:
DATE(expr)

Extracts the date part of the ...
mysql> SELECT DATE('2003-12-31 01:02:03');
       ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 130
130 DATEDIFF 14 Syntax:
DATEDIFF(expr1,expr2)

DATEDIFF() returns ...
mysql> SELECT DATEDIFF('2007-12-31 23:59:59','2007...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 131
131 DATE_ADD 14 Syntax:
DATE_ADD(date,INTERVAL expr unit), DATE_SU...
mysql> SELECT DATE_ADD('2018-05-01',INTERVAL 1 DAY...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 132
132 DATE_FORMAT 14 Syntax:
DATE_FORMAT(date,format)

Formats the date...
mysql> SELECT DATE_FORMAT('2009-10-04 22:23:00', '...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 133
133 DATE_SUB 14 Syntax:
DATE_SUB(date,INTERVAL expr unit)

See the...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 134
134 DAY 14 Syntax:
DAY(date)

DAY() is a synonym for DAYOFMON...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 135
135 DAYNAME 14 Syntax:
DAYNAME(date)

Returns the name of the wee...
mysql> SELECT DAYNAME('2007-02-03');
        -> 'S...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 136
136 DAYOFMONTH 14 Syntax:
DAYOFMONTH(date)

Returns the day of the m...
mysql> SELECT DAYOFMONTH('2007-02-03');
        ->...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 137
137 DAYOFWEEK 14 Syntax:
DAYOFWEEK(date)

Returns the weekday index...
mysql> SELECT DAYOFWEEK('2007-02-03');
        -> ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 138
138 DAYOFYEAR 14 Syntax:
DAYOFYEAR(date)

Returns the day of the ye...
mysql> SELECT DAYOFYEAR('2007-02-03');
        -> ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 139
139 EXTRACT 14 Syntax:
EXTRACT(unit FROM date)

The EXTRACT() fun...
mysql> SELECT EXTRACT(YEAR FROM '2019-07-02');
   ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 140
140 FROM_DAYS 14 Syntax:
FROM_DAYS(N)

Given a day number N, return...
mysql> SELECT FROM_DAYS(730669);
        -> '2000-...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 141
141 FROM_UNIXTIME 14 Syntax:
FROM_UNIXTIME(unix_timestamp[,format])

Re...
mysql> SELECT FROM_UNIXTIME(1447430881);
        -...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 142
142 GET_FORMAT 14 Syntax:
GET_FORMAT({DATE|TIME|DATETIME}, {'EUR'|'U...
mysql> SELECT DATE_FORMAT('2003-10-03',GET_FORMAT(...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 143
143 HOUR 14 Syntax:
HOUR(time)

Returns the hour for time. The...
mysql> SELECT HOUR('10:05:03');
        -> 10
mysq...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 144
144 LAST_DAY 14 Syntax:
LAST_DAY(date)

Takes a date or datetime v...
mysql> SELECT LAST_DAY('2003-02-05');
        -> '...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 145
145 LOCALTIME 14 Syntax:
LOCALTIME, LOCALTIME([fsp])

LOCALTIME and...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 146
146 LOCALTIMESTAMP 14 Syntax:
LOCALTIMESTAMP, LOCALTIMESTAMP([fsp])

LOC...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 147
147 MAKEDATE 14 Syntax:
MAKEDATE(year,dayofyear)

Returns a date, ...
mysql> SELECT MAKEDATE(2011,31), MAKEDATE(2011,32)...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 148
148 MAKETIME 14 Syntax:
MAKETIME(hour,minute,second)

Returns a ti...
mysql> SELECT MAKETIME(12,15,30);
        -> '12:1...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 149
149 MICROSECOND 14 Syntax:
MICROSECOND(expr)

Returns the microsecond...
mysql> SELECT MICROSECOND('12:00:00.123456');
    ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 150
150 MINUTE 14 Syntax:
MINUTE(time)

Returns the minute for time,...
mysql> SELECT MINUTE('2008-02-03 10:05:03');
     ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 151
151 MONTH 14 Syntax:
MONTH(date)

Returns the month for date, i...
mysql> SELECT MONTH('2008-02-03');
        -> 2

https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 152
152 MONTHNAME 14 Syntax:
MONTHNAME(date)

Returns the full name of ...
mysql> SELECT MONTHNAME('2008-02-03');
        -> ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 153
153 NOW 14 Syntax:
NOW([fsp])

Returns the current date and t...
mysql> SELECT NOW();
        -> '2007-12-15 23:50:...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 154
154 PERIOD_ADD 14 Syntax:
PERIOD_ADD(P,N)

Adds N months to period P...
mysql> SELECT PERIOD_ADD(200801,2);
        -> 200...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 155
155 PERIOD_DIFF 14 Syntax:
PERIOD_DIFF(P1,P2)

Returns the number of ...
mysql> SELECT PERIOD_DIFF(200802,200703);
        ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 156
156 QUARTER 14 Syntax:
QUARTER(date)

Returns the quarter of the ...
mysql> SELECT QUARTER('2008-04-01');
        -> 2

https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 157
157 SECOND 14 Syntax:
SECOND(time)

Returns the second for time,...
mysql> SELECT SECOND('10:05:03');
        -> 3

https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 158
158 SEC_TO_TIME 14 Syntax:
SEC_TO_TIME(seconds)

Returns the seconds ...
mysql> SELECT SEC_TO_TIME(2378);
        -> '00:39...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 159
159 STR_TO_DATE 14 Syntax:
STR_TO_DATE(str,format)

This is the inver...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 160
160 SUBDATE 14 Syntax:
SUBDATE(date,INTERVAL expr unit), SUBDATE(...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 161
161 SUBTIME 14 Syntax:
SUBTIME(expr1,expr2)

SUBTIME() returns ex...
mysql> SELECT SUBTIME('2007-12-31 23:59:59.999999'...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 162
162 SYSDATE 14 Syntax:
SYSDATE([fsp])

Returns the current date a...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 163
163 TIME FUNCTION 14 Syntax:
TIME(expr)

Extracts the time part of the ...
mysql> SELECT TIME('2003-12-31 01:02:03');
       ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 164
164 TIMEDIFF 14 Syntax:
TIMEDIFF(expr1,expr2)

TIMEDIFF() returns ...
mysql> SELECT TIMEDIFF('2000-01-01 00:00:00',
    ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 165
165 TIMESTAMP FUNCTION 14 Syntax:
TIMESTAMP(expr), TIMESTAMP(expr1,expr2)

W...
mysql> SELECT TIMESTAMP('2003-12-31');
        -> ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 166
166 TIMESTAMPADD 14 Syntax:
TIMESTAMPADD(unit,interval,datetime_expr)
...
mysql> SELECT TIMESTAMPADD(MINUTE, 1, '2003-01-02'...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 167
167 TIMESTAMPDIFF 14 Syntax:
TIMESTAMPDIFF(unit,datetime_expr1,datetime...
mysql> SELECT TIMESTAMPDIFF(MONTH,'2003-02-01','20...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 168
168 TIME_FORMAT 14 Syntax:
TIME_FORMAT(time,format)

This is used lik...
mysql> SELECT TIME_FORMAT('100:00:00', '%H %k %h %...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 169
169 TIME_TO_SEC 14 Syntax:
TIME_TO_SEC(time)

Returns the time argume...
mysql> SELECT TIME_TO_SEC('22:23:00');
        -> ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 170
170 TO_DAYS 14 Syntax:
TO_DAYS(date)

Given a date date, returns ...
mysql> SELECT TO_DAYS(950501);
        -> 728779
m...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 171
171 TO_SECONDS 14 Syntax:
TO_SECONDS(expr)

Given a date or datetime...
mysql> SELECT TO_SECONDS(950501);
        -> 62966...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 172
172 UNIX_TIMESTAMP 14 Syntax:
UNIX_TIMESTAMP([date])

If UNIX_TIMESTAMP(...
mysql> SELECT UNIX_TIMESTAMP();
        -> 1447431...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 173
173 UTC_DATE 14 Syntax:
UTC_DATE, UTC_DATE()

Returns the current ...
mysql> SELECT UTC_DATE(), UTC_DATE() + 0;
        ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 174
174 UTC_TIME 14 Syntax:
UTC_TIME, UTC_TIME([fsp])

Returns the cur...
mysql> SELECT UTC_TIME(), UTC_TIME() + 0;
        ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 175
175 UTC_TIMESTAMP 14 Syntax:
UTC_TIMESTAMP, UTC_TIMESTAMP([fsp])

Retur...
mysql> SELECT UTC_TIMESTAMP(), UTC_TIMESTAMP() + 0...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 176
176 WEEK 14 Syntax:
WEEK(date[,mode])

This function returns t...
mysql> SELECT WEEK('2008-02-20');
        -> 7
mys...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 177
177 WEEKDAY 14 Syntax:
WEEKDAY(date)

Returns the weekday index f...
mysql> SELECT WEEKDAY('2008-02-03 22:23:00');
    ...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 178
178 WEEKOFYEAR 14 Syntax:
WEEKOFYEAR(date)

Returns the calendar wee...
mysql> SELECT WEEKOFYEAR('2008-02-20');
        ->...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 179
179 YEAR 14 Syntax:
YEAR(date)

Returns the year for date, in ...
mysql> SELECT YEAR('1987-01-01');
        -> 1987

https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 180
180 YEARWEEK 14 Syntax:
YEARWEEK(date), YEARWEEK(date,mode)

Retur...
mysql> SELECT YEARWEEK('1987-01-01');
        -> 1...
https://dev.mysql.com/doc/refman/8.1/en/date-and-time-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 181
181 ASCII 15 Syntax:
ASCII(str)

Returns the numeric value of t...
mysql> SELECT ASCII('2');
        -> 50
mysql> SEL...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 182
182 BIN 15 Syntax:
BIN(N)

Returns a string representation of...
mysql> SELECT BIN(12);
        -> '1100'

https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 183
183 BIT_LENGTH 15 Syntax:
BIT_LENGTH(str)

Returns the length of the...
mysql> SELECT BIT_LENGTH('text');
        -> 32

https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 184
184 CHAR FUNCTION 15 Syntax:
CHAR(N,... [USING charset_name])

CHAR() i...
mysql> SELECT CHAR(77,121,83,81,'76');
+----------...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 185
185 CHAR_LENGTH 15 Syntax:
CHAR_LENGTH(str)

Returns the length of th...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 186
186 CHARACTER_LENGTH 15 Syntax:
CHARACTER_LENGTH(str)

CHARACTER_LENGTH() ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 187
187 CONCAT 15 Syntax:
CONCAT(str1,str2,...)

Returns the string ...
mysql> SELECT CONCAT('My', 'S', 'QL');
        -> ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 188
188 CONCAT_WS 15 Syntax:
CONCAT_WS(separator,str1,str2,...)

CONCAT...
mysql> SELECT CONCAT_WS(',','First name','Second n...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 189
189 ELT 15 Syntax:
ELT(N,str1,str2,str3,...)

ELT() returns t...
mysql> SELECT ELT(1, 'Aa', 'Bb', 'Cc', 'Dd');
    ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 190
190 EXPORT_SET 15 Syntax:
EXPORT_SET(bits,on,off[,separator[,number_...
mysql> SELECT EXPORT_SET(5,'Y','N',',',4);
       ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 191
191 FIELD 15 Syntax:
FIELD(str,str1,str2,str3,...)

Returns the...
mysql> SELECT FIELD('Bb', 'Aa', 'Bb', 'Cc', 'Dd', ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 192
192 FIND_IN_SET 15 Syntax:
FIND_IN_SET(str,strlist)

Returns a value ...
mysql> SELECT FIND_IN_SET('b','a,b,c,d');
        ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 193
193 FORMAT 15 Syntax:
FORMAT(X,D[,locale])

Formats the number X...
mysql> SELECT FORMAT(12332.123456, 4);
        -> ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 194
194 FROM_BASE64 15 Syntax:
FROM_BASE64(str)

Takes a string encoded w...
mysql> SELECT TO_BASE64('abc'), FROM_BASE64(TO_BAS...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 195
195 HEX 15 Syntax:
HEX(str), HEX(N)

For a string argument st...
mysql> SELECT X'616263', HEX('abc'), UNHEX(HEX('ab...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 196
196 INSERT FUNCTION 15 Syntax:
INSERT(str,pos,len,newstr)

Returns the st...
mysql> SELECT INSERT('Quadratic', 3, 4, 'What');
 ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 197
197 INSTR 15 Syntax:
INSTR(str,substr)

Returns the position of...
mysql> SELECT INSTR('foobarbar', 'bar');
        -...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 198
198 LCASE 15 Syntax:
LCASE(str)

LCASE() is a synonym for LOWER...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 199
199 LEFT 15 Syntax:
LEFT(str,len)

Returns the leftmost len ch...
mysql> SELECT LEFT('foobarbar', 5);
        -> 'fo...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
  help_topic_id name help_category_id description example url  
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 200
200 LENGTH 15 Syntax:
LENGTH(str)

Returns the length of the str...
mysql> SELECT LENGTH('text');
        -> 4

https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 201
201 LOAD_FILE 15 Syntax:
LOAD_FILE(file_name)

Reads the file and r...
mysql> UPDATE t
            SET blob_col=LOAD_FILE...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 202
202 LOCATE 15 Syntax:
LOCATE(substr,str), LOCATE(substr,str,pos)...
mysql> SELECT LOCATE('bar', 'foobarbar');
        ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 203
203 LOWER 15 Syntax:
LOWER(str)

Returns the string str with al...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 204
204 LPAD 15 Syntax:
LPAD(str,len,padstr)

Returns the string s...
mysql> SELECT LPAD('hi',4,'??');
        -> '??hi'...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 205
205 LTRIM 15 Syntax:
LTRIM(str)

Returns the string str with le...
mysql> SELECT LTRIM('  barbar');
        -> 'barba...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 206
206 MAKE_SET 15 Syntax:
MAKE_SET(bits,str1,str2,...)

Returns a se...
mysql> SELECT MAKE_SET(1,'a','b','c');
        -> ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 207
207 MID 15 Syntax:
MID(str,pos,len)

MID(str,pos,len) is a sy...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 208
208 OCT 15 Syntax:
OCT(N)

Returns a string representation of...
mysql> SELECT OCT(12);
        -> '14'

https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 209
209 OCTET_LENGTH 15 Syntax:
OCTET_LENGTH(str)

OCTET_LENGTH() is a syn...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 210
210 ORD 15 Syntax:
ORD(str)

If the leftmost character of the...
mysql> SELECT ORD('2');
        -> 50

https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 211
211 POSITION 15 Syntax:
POSITION(substr IN str)

POSITION(substr I...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 212
212 QUOTE 15 Syntax:
QUOTE(str)

Quotes a string to produce a r...
mysql> SELECT QUOTE('Don\'t!');
        -> 'Don\'t...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 213
213 REPEAT FUNCTION 15 Syntax:
REPEAT(str,count)

Returns a string consis...
mysql> SELECT REPEAT('MySQL', 3);
        -> 'MySQ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 214
214 REPLACE FUNCTION 15 Syntax:
REPLACE(str,from_str,to_str)

Returns the ...
mysql> SELECT REPLACE('www.mysql.com', 'w', 'Ww');...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 215
215 REVERSE 15 Syntax:
REVERSE(str)

Returns the string str with ...
mysql> SELECT REVERSE('abc');
        -> 'cba'

https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 216
216 RIGHT 15 Syntax:
RIGHT(str,len)

Returns the rightmost len ...
mysql> SELECT RIGHT('foobarbar', 4);
        -> 'r...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 217
217 RPAD 15 Syntax:
RPAD(str,len,padstr)

Returns the string s...
mysql> SELECT RPAD('hi',5,'?');
        -> 'hi???'...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 218
218 RTRIM 15 Syntax:
RTRIM(str)

Returns the string str with tr...
mysql> SELECT RTRIM('barbar   ');
        -> 'barb...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 219
219 SOUNDEX 15 Syntax:
SOUNDEX(str)

Returns a soundex string fro...
mysql> SELECT SOUNDEX('Hello');
        -> 'H400'
...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 220
220 SOUNDS LIKE 15 Syntax:
expr1 SOUNDS LIKE expr2

This is the same ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 221
221 SPACE 15 Syntax:
SPACE(N)

Returns a string consisting of N...
mysql> SELECT SPACE(6);
        -> '      '

https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 222
222 SUBSTR 15 Syntax:
SUBSTR(str,pos), SUBSTR(str FROM pos), SUB...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 223
223 SUBSTRING 15 Syntax:
SUBSTRING(str,pos), SUBSTRING(str FROM pos...
mysql> SELECT SUBSTRING('Quadratically',5);
      ...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 224
224 SUBSTRING_INDEX 15 Syntax:
SUBSTRING_INDEX(str,delim,count)

Returns ...
mysql> SELECT SUBSTRING_INDEX('www.mysql.com', '.'...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 225
225 TO_BASE64 15 Syntax:
TO_BASE64(str)

Converts the string argume...
mysql> SELECT TO_BASE64('abc'), FROM_BASE64(TO_BAS...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 226
226 TRIM 15 Syntax:
TRIM([{BOTH | LEADING | TRAILING} [remstr]...
mysql> SELECT TRIM('  bar   ');
        -> 'bar'
m...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 227
227 UCASE 15 Syntax:
UCASE(str)

UCASE() is a synonym for UPPER...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 228
228 UNHEX 15 Syntax:
UNHEX(str)

For a string argument str, UNH...
mysql> SELECT UNHEX('4D7953514C');
        -> 'MyS...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 229
229 UPPER 15 Syntax:
UPPER(str)

Returns the string str with al...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 230
230 WEIGHT_STRING 15 Syntax:
WEIGHT_STRING(str [AS {CHAR|BINARY}(N)] [f...
https://dev.mysql.com/doc/refman/8.1/en/string-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 231
231 LIKE 15 Syntax:
expr LIKE pat [ESCAPE 'escape_char']

Patt...
mysql> SELECT 'David!' LIKE 'David_';
        -> 1...
https://dev.mysql.com/doc/refman/8.1/en/string-comparison-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 232
232 NOT LIKE 15 Syntax:
expr NOT LIKE pat [ESCAPE 'escape_char']

...
https://dev.mysql.com/doc/refman/8.1/en/string-comparison-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 233
233 STRCMP 15 Syntax:
STRCMP(expr1,expr2)

STRCMP() returns 0 if...
mysql> SELECT STRCMP('text', 'text2');
        -> ...
https://dev.mysql.com/doc/refman/8.1/en/string-comparison-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 234
234 NOT REGEXP 15 Syntax:
expr NOT REGEXP pat, expr NOT RLIKE pat

T...
https://dev.mysql.com/doc/refman/8.1/en/regexp.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 235
235 REGEXP 15 Syntax:
expr REGEXP pat, expr RLIKE pat

Returns 1...
mysql> SELECT 'Michael!' REGEXP '.*';
+-----------...
https://dev.mysql.com/doc/refman/8.1/en/regexp.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 236
236 REGEXP_INSTR 15 REGEXP_INSTR(expr, pat[, pos[, occurrence[, return...
mysql> SELECT REGEXP_INSTR('dog cat dog', 'dog');
...
https://dev.mysql.com/doc/refman/8.1/en/regexp.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 237
237 REGEXP_LIKE 15 REGEXP_LIKE(expr, pat[, match_type])

Returns 1 if...
mysql> SELECT REGEXP_LIKE('Michael!', '.*');
+----...
https://dev.mysql.com/doc/refman/8.1/en/regexp.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 238
238 REGEXP_REPLACE 15 REGEXP_REPLACE(expr, pat, repl[, pos[, occurrence[...
mysql> SELECT REGEXP_REPLACE('a b c', 'b', 'X');
+...
https://dev.mysql.com/doc/refman/8.1/en/regexp.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 239
239 REGEXP_SUBSTR 15 REGEXP_SUBSTR(expr, pat[, pos[, occurrence[, match...
mysql> SELECT REGEXP_SUBSTR('abc def ghi', '[a-z]+...
https://dev.mysql.com/doc/refman/8.1/en/regexp.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 240
240 MATCH AGAINST 15 Syntax:
MATCH (col1,col2,...) AGAINST (expr [searc...
mysql> SELECT id, body, MATCH (title,body)
    -> ...
https://dev.mysql.com/doc/refman/8.1/en/fulltext-search.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 241
241 BINARY OPERATOR 16 Syntax:
BINARY expr

The BINARY operator converts ...
mysql> SET NAMES utf8mb4 COLLATE utf8mb4_general_c...
https://dev.mysql.com/doc/refman/8.1/en/cast-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 242
242 CAST 16 Syntax:
CAST(expr AS type [ARRAY])

CAST(timestamp...
https://dev.mysql.com/doc/refman/8.1/en/cast-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 243
243 CONVERT 16 Syntax:
CONVERT(expr USING transcoding_name)

CONV...
https://dev.mysql.com/doc/refman/8.1/en/cast-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 244
244 EXTRACTVALUE 17 Syntax:
ExtractValue(xml_frag, xpath_expr)

Extrac...
mysql> SELECT
    ->   ExtractValue('<a>ccc<b>ddd<...
https://dev.mysql.com/doc/refman/8.1/en/xml-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 245
245 UPDATEXML 17 Syntax:
UpdateXML(xml_target, xpath_expr, new_xml)...
mysql> SELECT
    ->   UpdateXML('<a><b>ccc</b><d>...
https://dev.mysql.com/doc/refman/8.1/en/xml-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 246
246 AES_DECRYPT 19 Syntax:
AES_DECRYPT(crypt_str,key_str[,init_vector...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 247
247 AES_ENCRYPT 19 Syntax:
AES_ENCRYPT(str,key_str[,init_vector][,kdf...
mysql> SET block_encryption_mode = 'aes-256-cbc';
...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 248
248 COMPRESS 19 Syntax:
COMPRESS(string_to_compress)

Compresses a...
mysql> SELECT LENGTH(COMPRESS(REPEAT('a',1000)));
...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 249
249 MD5 19 Syntax:
MD5(str)

Calculates an MD5 128-bit checks...
mysql> SELECT MD5('testing');
        -> 'ae2b1fca...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 250
250 RANDOM_BYTES 19 Syntax:
RANDOM_BYTES(len)

This function returns a...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 251
251 SHA1 19 Syntax:
SHA1(str), SHA(str)

Calculates an SHA-1 1...
mysql> SELECT SHA1('abc');
        -> 'a9993e36470...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 252
252 SHA2 19 Syntax:
SHA2(str, hash_length)

Calculates the SHA...
mysql> SELECT SHA2('abc', 224);
        -> '23097d...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 253
253 STATEMENT_DIGEST 19 STATEMENT_DIGEST(statement)

Given an SQL statemen...
mysql> SET @stmt = 'SELECT * FROM mytable WHERE co...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 254
254 STATEMENT_DIGEST_TEXT 19 STATEMENT_DIGEST_TEXT(statement)

Given an SQL sta...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 255
255 UNCOMPRESS 19 Syntax:
UNCOMPRESS(string_to_uncompress)

Uncompre...
mysql> SELECT UNCOMPRESS(COMPRESS('any string'));
...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 256
256 UNCOMPRESSED_LENGTH 19 Syntax:
UNCOMPRESSED_LENGTH(compressed_string)

Re...
mysql> SELECT UNCOMPRESSED_LENGTH(COMPRESS(REPEAT(...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 257
257 VALIDATE_PASSWORD_STRENGTH 19 Syntax:
VALIDATE_PASSWORD_STRENGTH(str)

Given an ...
https://dev.mysql.com/doc/refman/8.1/en/encryption-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 258
258 GET_LOCK 20 Syntax:
GET_LOCK(str,timeout)

Tries to obtain a l...
https://dev.mysql.com/doc/refman/8.1/en/locking-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 259
259 IS_FREE_LOCK 20 Syntax:
IS_FREE_LOCK(str)

Checks whether the lock...
https://dev.mysql.com/doc/refman/8.1/en/locking-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 260
260 IS_USED_LOCK 20 Syntax:
IS_USED_LOCK(str)

Checks whether the lock...
https://dev.mysql.com/doc/refman/8.1/en/locking-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 261
261 RELEASE_ALL_LOCKS 20 Syntax:
RELEASE_ALL_LOCKS()

Releases all named lo...
https://dev.mysql.com/doc/refman/8.1/en/locking-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 262
262 RELEASE_LOCK 20 Syntax:
RELEASE_LOCK(str)

Releases the lock named...
https://dev.mysql.com/doc/refman/8.1/en/locking-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 263
263 BENCHMARK 21 Syntax:
BENCHMARK(count,expr)

The BENCHMARK() fun...
mysql> SELECT BENCHMARK(1000000,AES_ENCRYPT('hello...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 264
264 CHARSET 21 Syntax:
CHARSET(str)

Returns the character set of...
mysql> SELECT CHARSET('abc');
        -> 'utf8mb3'...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 265
265 COERCIBILITY 21 Syntax:
COERCIBILITY(str)

Returns the collation c...
mysql> SELECT COERCIBILITY('abc' COLLATE utf8mb4_s...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 266
266 COLLATION 21 Syntax:
COLLATION(str)

Returns the collation of t...
mysql> SELECT COLLATION('abc');
        -> 'utf8mb...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 267
267 CONNECTION_ID 21 Syntax:
CONNECTION_ID()

Returns the connection ID...
mysql> SELECT CONNECTION_ID();
        -> 23786

https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 268
268 CURRENT_ROLE 21 CURRENT_ROLE()

Returns a utf8mb3 string containin...
GRANT 'r1', 'r2' TO 'u1'@'localhost';
SET DEFAULT ...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 269
269 CURRENT_USER 21 Syntax:
CURRENT_USER, CURRENT_USER()

Returns the ...
mysql> SELECT USER();
        -> 'davida@localhost...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 270
270 DATABASE 21 Syntax:
DATABASE()

Returns the default (current) ...
mysql> SELECT DATABASE();
        -> 'test'

https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 271
271 FOUND_ROWS 21 Syntax:
FOUND_ROWS()

*Note*:

The SQL_CALC_FOUND_...
mysql> SELECT SQL_CALC_FOUND_ROWS * FROM tbl_name
...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 272
272 ICU_VERSION 21 ICU_VERSION()

The version of the International Co...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 273
273 LAST_INSERT_ID 21 Syntax:
LAST_INSERT_ID(), LAST_INSERT_ID(expr)

Wi...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 274
274 ROLES_GRAPHML 21 ROLES_GRAPHML()

Returns a utf8mb3 string containi...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 275
275 ROW_COUNT 21 Syntax:
ROW_COUNT()

ROW_COUNT() returns a value a...
mysql> INSERT INTO t VALUES(1),(2),(3);
Query OK, ...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 276
276 SCHEMA 21 Syntax:
SCHEMA()

This function is a synonym for D...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 277
277 SESSION_USER 21 Syntax:
SESSION_USER()

SESSION_USER() is a synony...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 278
278 SYSTEM_USER 21 Syntax:
SYSTEM_USER()

SYSTEM_USER() is a synonym ...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 279
279 USER 21 Syntax:
USER()

Returns the current MySQL user nam...
mysql> SELECT USER();
        -> 'davida@localhost...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 280
280 VERSION 21 Syntax:
VERSION()

Returns a string that indicates...
mysql> SELECT VERSION();
        -> '8.1.0-standar...
https://dev.mysql.com/doc/refman/8.1/en/information-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 281
281 ST_GEOMCOLLFROMTEXT 23 ST_GeomCollFromText(wkt [, srid [, options]]),
ST_...
mysql> SET @g = "MULTILINESTRING((10 10, 11 11), (...
https://dev.mysql.com/doc/refman/8.1/en/gis-wkt-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 282
282 ST_GEOMFROMTEXT 23 ST_GeomFromText(wkt [, srid [, options]]), ST_Geom... https://dev.mysql.com/doc/refman/8.1/en/gis-wkt-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 283
283 ST_LINEFROMTEXT 23 ST_LineFromText(wkt [, srid [, options]]), ST_Line... https://dev.mysql.com/doc/refman/8.1/en/gis-wkt-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 284
284 ST_MLINEFROMTEXT 23 ST_MLineFromText(wkt [, srid [, options]]),
ST_Mul...
https://dev.mysql.com/doc/refman/8.1/en/gis-wkt-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 285
285 ST_MPOINTFROMTEXT 23 ST_MPointFromText(wkt [, srid [, options]]), ST_Mu... https://dev.mysql.com/doc/refman/8.1/en/gis-wkt-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 286
286 ST_MPOLYFROMTEXT 23 ST_MPolyFromText(wkt [, srid [, options]]), ST_Mul... https://dev.mysql.com/doc/refman/8.1/en/gis-wkt-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 287
287 ST_POINTFROMTEXT 23 ST_PointFromText(wkt [, srid [, options]])

Constr...
https://dev.mysql.com/doc/refman/8.1/en/gis-wkt-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 288
288 ST_POLYFROMTEXT 23 ST_PolyFromText(wkt [, srid [, options]]), ST_Poly... https://dev.mysql.com/doc/refman/8.1/en/gis-wkt-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 289
289 ST_GEOMCOLLFROMWKB 24 ST_GeomCollFromWKB(wkb [, srid [, options]]),
ST_G...
https://dev.mysql.com/doc/refman/8.1/en/gis-wkb-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 290
290 ST_GEOMFROMWKB 24 ST_GeomFromWKB(wkb [, srid [, options]]), ST_Geome... https://dev.mysql.com/doc/refman/8.1/en/gis-wkb-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 291
291 ST_LINEFROMWKB 24 ST_LineFromWKB(wkb [, srid [, options]]), ST_LineS... https://dev.mysql.com/doc/refman/8.1/en/gis-wkb-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 292
292 ST_MLINEFROMWKB 24 ST_MLineFromWKB(wkb [, srid [, options]]),
ST_Mult...
https://dev.mysql.com/doc/refman/8.1/en/gis-wkb-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 293
293 ST_MPOINTFROMWKB 24 ST_MPointFromWKB(wkb [, srid [, options]]), ST_Mul... https://dev.mysql.com/doc/refman/8.1/en/gis-wkb-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 294
294 ST_MPOLYFROMWKB 24 ST_MPolyFromWKB(wkb [, srid [, options]]), ST_Mult... https://dev.mysql.com/doc/refman/8.1/en/gis-wkb-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 295
295 ST_POINTFROMWKB 24 ST_PointFromWKB(wkb [, srid [, options]])

Constru...
https://dev.mysql.com/doc/refman/8.1/en/gis-wkb-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 296
296 ST_POLYFROMWKB 24 ST_PolyFromWKB(wkb [, srid [, options]]), ST_Polyg... https://dev.mysql.com/doc/refman/8.1/en/gis-wkb-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 297
297 GEOMCOLLECTION 25 GeomCollection(g [, g] ...)

Constructs a GeomColl...
https://dev.mysql.com/doc/refman/8.1/en/gis-mysql-specific-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 298
298 GEOMETRYCOLLECTION 25 GeometryCollection(g [, g] ...)

Constructs a Geom...
https://dev.mysql.com/doc/refman/8.1/en/gis-mysql-specific-functions.html
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DELETE FROM help_topic WHERE `help_topic`.`help_topic_id` = 299
299 LINESTRING 25 LineString(pt [, pt] ...)

Constructs a LineString...
https://dev.mysql.com/doc/refman/8.1/en/gis-mysql-specific-functions.html
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