Following is a list of all important Date and Time related functions available through SQL. There are various other functions supported by your RDBMS. Given list is based on MySQL RDBMS.
| Name | Description |
|---|---|
| ADDDATE() | Adds dates |
| ADDTIME() | Adds time |
| CONVERT_TZ() | Converts from one timezone to another |
| CURDATE() | Returns the current date |
| CURRENT_DATE(), CURRENT_DATE | Synonyms for CURDATE() |
| CURRENT_TIME(), CURRENT_TIME | Synonyms for CURTIME() |
| CURRENT_TIMESTAMP(), CURRENT_TIMESTAMP | Synonyms for NOW() |
| CURTIME() | Returns the current time |
| DATE_ADD() | Adds two dates |
| DATE_FORMAT() | Formats date as specified |
| DATE_SUB() | Subtracts two dates |
| DATE() | Extracts the date part of a date or datetime expression |
| DATEDIFF() | Subtracts two dates |
| DAY() | Synonym for DAYOFMONTH() |
| DAYNAME() | Returns the name of the weekday |
| DAYOFMONTH() | Returns the day of the month (1-31) |
| DAYOFWEEK() | Returns the weekday index of the argument |
| DAYOFYEAR() | Returns the day of the year (1-366) |
| EXTRACT | Extracts part of a date |
| FROM_DAYS() | Converts a day number to a date |
| FROM_UNIXTIME() | Formats date as a UNIX timestamp |
| HOUR() | Extracts the hour |
| LAST_DAY | Returns the last day of the month for the argument |
| LOCALTIME(), LOCALTIME | Synonym for NOW() |
| LOCALTIMESTAMP, LOCALTIMESTAMP() | Synonym for NOW() |
| MAKEDATE() | Creates a date from the year and day of year |
| MAKETIME | MAKETIME() |
| MICROSECOND() | Returns the microseconds from argument |
| MINUTE() | Returns the minute from the argument |
| MONTH() | Return the month from the date passed |
| MONTHNAME() | Returns the name of the month |
| NOW() | Returns the current date and time |
| PERIOD_ADD() | Adds a period to a year-month |
| PERIOD_DIFF() | Returns the number of months between periods |
| QUARTER() | Returns the quarter from a date argument |
| SEC_TO_TIME() | Converts seconds to 'HH:MM:SS' format |
| SECOND() | Returns the second (0-59) |
| STR_TO_DATE() | Converts a string to a date |
| SUBDATE() | When invoked with three arguments a synonym for DATE_SUB() |
| SUBTIME() | Subtracts times |
| SYSDATE() | Returns the time at which the function executes |
| TIME_FORMAT() | Formats as time |
| TIME_TO_SEC() | Returns the argument converted to seconds |
| TIME() | Extracts the time portion of the expression passed |
| TIMEDIFF() | Subtracts time |
| TIMESTAMP() | With a single argument, this function returns the date or datetime expression. With two arguments, the sum of the arguments |
| TIMESTAMPADD() | Adds an interval to a datetime expression |
| TIMESTAMPDIFF() | Subtracts an interval from a datetime expression |
| TO_DAYS() | Returns the date argument converted to days |
| UNIX_TIMESTAMP() | Returns a UNIX timestamp |
| UTC_DATE() | Returns the current UTC date |
| UTC_TIME() | Returns the current UTC time |
| UTC_TIMESTAMP() | Returns the current UTC date and time |
| WEEK() | Returns the week number |
| WEEKDAY() | Returns the weekday index |
| WEEKOFYEAR() | Returns the calendar week of the date (1-53) |
| YEAR() | Returns the year |
| YEARWEEK() | Returns the year and week |
