[mysql]Date and Time Functions DATE_ADD, DATE_SUB
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작성자 sbLAB 댓글 0건 조회 8,104회 작성일 18-07-25 17:12본문
http://dev.mysql.com/doc/refman/5.6/en/date-and-time-functions.html
개발을 하다보면, 날짜를 몇달전/후로 변경한다거나, 몇년전/후의 날짜를 알아야 할때가 있다.
그 예는 아래와 같다.
mysql> SELECT DATE_ADD('2009-01-30', INTERVAL 1 MONTH);
-> '2009-02-28'
mysql> SELECT DATE_SUB('1998-01-02', INTERVAL 31 DAY);
-> '1997-12-02'
12.7. Date and Time Functions
This section describes the functions that can be used to manipulate temporal values. See Section 11.3, “Date and Time Types”, for a description of the range of values each date and time type has and the valid formats in which values may be specified.
Table 12.13. Date/Time Functions
Name | Description |
---|---|
ADDDATE() | Add time values (intervals) to a date value |
ADDTIME() | Add time |
CONVERT_TZ() | Convert from one timezone to another |
CURDATE() | Return 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() | Return the current time |
DATE_ADD() | Add time values (intervals) to a date value |
DATE_FORMAT() | Format date as specified |
DATE_SUB() | Subtract a time value (interval) from a date |
DATE() | Extract the date part of a date or datetime expression |
DATEDIFF() | Subtract two dates |
DAY() | Synonym for DAYOFMONTH() |
DAYNAME() | Return the name of the weekday |
DAYOFMONTH() | Return the day of the month (0-31) |
DAYOFWEEK() | Return the weekday index of the argument |
DAYOFYEAR() | Return the day of the year (1-366) |
EXTRACT() | Extract part of a date |
FROM_DAYS() | Convert a day number to a date |
FROM_UNIXTIME() | Format UNIX timestamp as a date |
GET_FORMAT() | Return a date format string |
HOUR() | Extract the hour |
LAST_DAY | Return the last day of the month for the argument |
LOCALTIME() , LOCALTIME | Synonym for NOW() |
LOCALTIMESTAMP , LOCALTIMESTAMP() | Synonym for NOW() |
MAKEDATE() | Create a date from the year and day of year |
MAKETIME | MAKETIME() |
MICROSECOND() | Return the microseconds from argument |
MINUTE() | Return the minute from the argument |
MONTH() | Return the month from the date passed |
MONTHNAME() | Return the name of the month |
NOW() | Return the current date and time |
PERIOD_ADD() | Add a period to a year-month |
PERIOD_DIFF() | Return the number of months between periods |
QUARTER() | Return the quarter from a date argument |
SEC_TO_TIME() | Converts seconds to 'HH:MM:SS' format |
SECOND() | Return the second (0-59) |
STR_TO_DATE() | Convert a string to a date |
SUBDATE() | A synonym for DATE_SUB() when invoked with three arguments |
SUBTIME() | Subtract times |
SYSDATE() | Return the time at which the function executes |
TIME_FORMAT() | Format as time |
TIME_TO_SEC() | Return the argument converted to seconds |
TIME() | Extract the time portion of the expression passed |
TIMEDIFF() | Subtract time |
TIMESTAMP() | With a single argument, this function returns the date or datetime expression; with two arguments, the sum of the arguments |
TIMESTAMPADD() | Add an interval to a datetime expression |
TIMESTAMPDIFF() | Subtract an interval from a datetime expression |
TO_DAYS() | Return the date argument converted to days |
TO_SECONDS() | Return the date or datetime argument converted to seconds since Year 0 |
UNIX_TIMESTAMP() | Return a UNIX timestamp |
UTC_DATE() | Return the current UTC date |
UTC_TIME() | Return the current UTC time |
UTC_TIMESTAMP() | Return the current UTC date and time |
WEEK() | Return the week number |
WEEKDAY() | Return the weekday index |
WEEKOFYEAR() | Return the calendar week of the date (0-53) |
YEAR() | Return the year |
YEARWEEK() | Return the year and week |
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