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0
HELP_DATE
1
This help information was generated from the MySQL...
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1
HELP_VERSION
1
This help information was generated from the MySQL...
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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
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url
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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LINESTRING
25
LineString(pt [, pt] ...)
Constructs a LineString...
https://dev.mysql.com/doc/refman/8.1/en/gis-mysql-specific-functions.html