MySQL has many built-in functions.
This reference contains string, numeric, date, and some advanced functions
in MySQL.
Function |
Description |
ASCII |
Returns the ASCII value for the specific character |
CHAR_LENGTH |
Returns the length of a string (in characters) |
CHARACTER_LENGTH |
Returns the length of a string (in characters) |
CONCAT |
Adds two or more expressions together |
CONCAT_WS |
Adds two or more expressions together with a separator |
FIELD |
Returns the index position of a value in a list of values |
FIND_IN_SET |
Returns the position of a string within a list of strings |
FORMAT |
Formats a number to a format like "#,###,###.##", rounded to a
specified number
of decimal places |
INSERT |
Inserts a string within a string at the specified position and for a certain
number of characters |
INSTR |
Returns the position of the first occurrence of a string in another string |
LCASE |
Converts a string to lower-case |
LEFT |
Extracts a number of characters from a string (starting from left) |
LENGTH |
Returns the length of a string (in bytes) |
LOCATE |
Returns the position of the first occurrence of a substring in a string |
LOWER |
Converts a string to lower-case |
LPAD |
Left-pads a string with another string, to a certain length |
LTRIM |
Removes leading spaces from a string |
MID |
Extracts a substring from a string (starting at any position) |
POSITION |
Returns the position of the first occurrence of a substring in a string |
REPEAT |
Repeats a string as many times as specified |
REPLACE |
Replaces all occurrences of a substring within a string, with a new
substring |
REVERSE |
Reverses a string and returns the result |
RIGHT |
Extracts a number of characters from a string (starting from right) |
RPAD |
Right-pads a string with another string, to a certain length |
RTRIM |
Removes trailing spaces from a string |
SPACE |
Returns a string of the specified number of space characters |
STRCMP |
Compares two strings |
SUBSTR |
Extracts a substring from a string (starting at any position) |
SUBSTRING |
Extracts a substring from a string (starting at any position) |
SUBSTRING_INDEX |
Returns a substring of a string before a specified number of
delimiter occurs |
TRIM |
Removes leading and trailing spaces from a string |
UCASE |
Converts a string to upper-case |
UPPER |
Converts a string to upper-case |
Function |
Description |
ABS |
Returns the absolute value of a number |
ACOS |
Returns the arc cosine of a number |
ASIN |
Returns the arc sine of a number |
ATAN |
Returns the arc tangent of one or two numbers |
ATAN2 |
Returns the arc tangent of two numbers |
AVG |
Returns the average value of an expression |
CEIL |
Returns the smallest integer value that is >= to a number |
CEILING |
Returns the smallest integer value that is >= to a number |
COS |
Returns the cosine of a number |
COT |
Returns the cotangent of a number |
COUNT |
Returns the number of records returned by a select query |
DEGREES |
Converts a value in radians to degrees |
DIV |
Used for integer division |
EXP |
Returns e raised to the power of a specified number |
FLOOR |
Returns the largest integer value that is <= to a number |
GREATEST |
Returns the greatest value of the list of arguments |
LEAST |
Returns the smallest value of the list of arguments |
LN |
Returns the natural logarithm of a number |
LOG |
Returns the natural logarithm of a number, or the logarithm of a number to a
specified base |
LOG10 |
Returns the natural logarithm of a number to base 10 |
LOG2 |
Returns the natural logarithm of a number to base 2 |
MAX |
Returns the maximum value in a set of values |
MIN |
Returns the minimum value in a set of values |
MOD |
Returns the remainder of a number divided by another number |
PI |
Returns the value of PI |
POW |
Returns the value of a number raised to the power of another number |
POWER |
Returns the value of a number raised to the power of another number |
RADIANS |
Converts a degree value into radians |
RAND |
Returns a random number |
ROUND |
Rounds a number to a specified number of decimal places |
SIGN |
Returns the sign of a number |
SIN |
Returns the sine of a number |
SQRT |
Returns the square root of a number |
SUM |
Calculates the sum of a set of values |
TAN |
Returns the tangent of a number |
TRUNCATE |
Truncates a number to the specified number of decimal places |
Function |
Description |
ADDDATE |
Adds a time/date interval to a date and then returns the date |
ADDTIME |
Adds a time interval to a time/datetime and then returns the time/datetime |
CURDATE |
Returns the current date |
CURRENT_DATE |
Returns the current date |
CURRENT_TIME |
Returns the current time |
CURRENT_TIMESTAMP |
Returns the current date and time |
CURTIME |
Returns the current time |
DATE |
Extracts the date part from a datetime expression |
DATEDIFF |
Returns the number of days between two date values |
DATE_ADD |
Adds a time/date interval to a date and then returns the date |
DATE_FORMAT |
Formats a date |
DATE_SUB |
Subtracts a time/date interval from a date and then returns the date |
DAY |
Returns the day of the month for a given date |
DAYNAME |
Returns the weekday name for a given date |
DAYOFMONTH |
Returns the day of the month for a given date |
DAYOFWEEK |
Returns the weekday index for a given date |
DAYOFYEAR |
Returns the day of the year for a given date |
EXTRACT |
Extracts a part from a given date |
FROM_DAYS |
Returns a date from a numeric datevalue |
HOUR |
Returns the hour part for a given date |
LAST_DAY |
Extracts the last day of the month for a given date |
LOCALTIME |
Returns the current date and time |
LOCALTIMESTAMP |
Returns the current date and time |
MAKEDATE |
Creates and returns a date based on a year and a number of days value |
MAKETIME |
Creates and returns a time based on an hour, minute, and second value |
MICROSECOND |
Returns the microsecond part of a time/datetime |
MINUTE |
Returns the minute part of a time/datetime |
MONTH |
Returns the month part for a given date |
MONTHNAME |
Returns the name of the month for a given date |
NOW |
Returns the current date and time |
PERIOD_ADD |
Adds a specified number of months to a period |
PERIOD_DIFF |
Returns the difference between two periods |
QUARTER |
Returns the quarter of the year for a given date value |
SECOND |
Returns the seconds part of a time/datetime |
SEC_TO_TIME |
Returns a time value based on the specified seconds |
STR_TO_DATE |
Returns a date based on a string and a format |
SUBDATE |
Subtracts a time/date interval from a date and then returns the date |
SUBTIME |
Subtracts a time interval from a datetime and then returns the time/datetime |
SYSDATE |
Returns the current date and time |
TIME |
Extracts the time part from a given time/datetime |
TIME_FORMAT |
Formats a time by a specified format |
TIME_TO_SEC |
Converts a time value into seconds |
TIMEDIFF |
Returns the difference between two time/datetime expressions |
TIMESTAMP |
Returns a datetime value based on a date or datetime value |
TO_DAYS |
Returns the number of days between a date and date "0000-00-00" |
WEEK |
Returns the week number for a given date |
WEEKDAY |
Returns the weekday number for a given date |
WEEKOFYEAR |
Returns the week number for a given date |
YEAR |
Returns the year part for a given date |
YEARWEEK |
Returns the year and week number for a given date |
Function |
Description |
BIN |
Returns a binary representation of a number |
BINARY |
Converts a value to a binary string |
CASE |
Goes through conditions and return a value when the first condition is
met |
CAST |
Converts a value (of any type) into a specified datatype |
COALESCE |
Returns the first non-null value in a list |
CONNECTION_ID |
Returns the unique connection ID for the current connection |
CONV |
Converts a number from one numeric base system to another |
CONVERT |
Converts a value into the specified datatype or character set |
CURRENT_USER |
Returns the user name and host name for the MySQL account that the server
used to authenticate the current client |
DATABASE |
Returns the name of the current database |
IF |
Returns a value if a condition is TRUE, or another value if a condition is FALSE |
IFNULL |
Return a specified value if the expression is NULL, otherwise return the
expression |
ISNULL |
Returns 1 or 0 depending on whether an expression is NULL |
LAST_INSERT_ID |
Returns the AUTO_INCREMENT id of the last row that has been inserted in a table |
NULLIF |
Compares two expressions and returns NULL if they are equal. Otherwise, the
first expression is returned |
SESSION_USER |
Returns the current MySQL user name and host name |
SYSTEM_USER |
Returns the current MySQL user name and host name |
USER |
Returns the current MySQL user name and host name |
VERSION |
Returns the current version of the MySQL database |