MySQL built-in date functions TIMESTAMPDIFF calculate difference between two dates seconds, minutes, hours, days, weeks, quarters, months, years, increase or decrease the current date day, a week, and so on.
SELECT TIMESTAMPDIFF (type, start time, end time)
The difference between the number of seconds:
SELECT TIMESTAMPDIFF(SECOND,'1993-03-23 00:00:00',DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%S'))
The difference between the number of minutes:
SELECT TIMESTAMPDIFF(MINUTE,'1993-03-23 00:00:00',DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%S'))
The difference between the number of hours:
SELECT TIMESTAMPDIFF(HOUR,'1993-03-23 00:00:00 00:00:00',DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%S'))
The difference between the number of days:
SELECT TIMESTAMPDIFF(DAY,'1993-03-23 00:00:00',DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%S'))
The difference between the number of weeks:
SELECT TIMESTAMPDIFF(WEEK,'1993-03-23 00:00:00',DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%S'))
The difference between the number of quarters:
SELECT TIMESTAMPDIFF(QUARTER,'1993-03-23 00:00:00',DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%S'))
A difference of a few months:
SELECT TIMESTAMPDIFF(MONTH,'1993-03-23 00:00:00',DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%S'))
A difference of a few years:
SELECT TIMESTAMPDIFF(YEAR,'1993-03-23 00:00:00',DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:%S'))
Get the current date:
SELECT NOW() SELECT CURDATE()
Add a day to the current date:
SELECT DATE_SUB(CURDATE(),INTERVAL -1 DAY)
The current date to reduce the Day:
SELECT DATE_SUB(CURDATE(),INTERVAL 1 DAY)
The current date for an additional week:
SELECT DATE_SUB(CURDATE(),INTERVAL -1 WEEK)
SELECT DATE_SUB(NOW(),INTERVAL -1 MONTH)
The current date increase in January:
SELECT DATE_SUB(CURDATE(),INTERVAL -1 MONTH)
- FRAC_SECOND ms
- SECOND sec
- MINUTE minutes
- HOUR hours
- DAY days
- WEEK week
- MONTH month
- QUARTER quarter
- , YEAR