month_floor

description

Syntax

  1. DATETIME MONTH_FLOOR(DATETIME datetime)
  2. DATETIME MONTH_FLOOR(DATETIME datetime, DATETIME origin)
  3. DATETIME MONTH_FLOOR(DATETIME datetime, INT period)
  4. DATETIME MONTH_FLOOR(DATETIME datetime, INT period, DATETIME origin)

将日期转化为指定的时间间隔周期的最近下取整时刻。

  • datetime:参数是合法的日期表达式。
  • period:参数是指定每个周期有多少天组成。
  • origin:开始的时间起点,如果不填,默认是 0001-01-01T00:00:00。

example

  1. mysql> select month_floor("2023-07-13 22:28:18", 5);
  2. +--------------------------------------------------------------+
  3. | month_floor(cast('2023-07-13 22:28:18' as DATETIMEV2(0)), 5) |
  4. +--------------------------------------------------------------+
  5. | 2023-05-01 00:00:00 |
  6. +--------------------------------------------------------------+
  7. 1 row in set (0.12 sec)

keywords

  1. MONTH_FLOOR, MONTH, FLOOR

Best Practice

还可参阅 date_floor