days_diff
description
Syntax
INT days_diff(DATETIME enddate, DATETIME startdate)
开始时间到结束时间相差几天，对日期的判断精确到秒，并向下取整数。 区别于datediff，datediff函数对日期的判断精确到天。
example
mysql> select days_diff('2020-12-25 22:00:00','2020-12-24 22:00:00');
+---------------------------------------------------------+
| days_diff('2020-12-25 22:00:00', '2020-12-24 22:00:00') |
+---------------------------------------------------------+
| 1 |
+---------------------------------------------------------+
mysql> select days_diff('2020-12-25 22:00:00','2020-12-24 22:00:01');
+---------------------------------------------------------+
| days_diff('2020-12-24 22:00:01', '2020-12-25 22:00:00') |
+---------------------------------------------------------+
| 0 |
+---------------------------------------------------------+keywords
days_diff