second_floor

description

Syntax

  1. DATETIME SECOND_FLOOR(DATETIME datetime)
  2. DATETIME SECOND_FLOOR(DATETIME datetime, DATETIME origin)
  3. DATETIME SECOND_FLOOR(DATETIME datetime, INT period)
  4. DATETIME SECOND_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 second_floor("2023-07-13 22:28:18", 5);
  2. +---------------------------------------------------------------+
  3. | second_floor(cast('2023-07-13 22:28:18' as DATETIMEV2(0)), 5) |
  4. +---------------------------------------------------------------+
  5. | 2023-07-13 22:28:15 |
  6. +---------------------------------------------------------------+
  7. 1 row in set (0.10 sec)

keywords

  1. SECOND_FLOOR, SECOND, FLOOR

Best Practice

还可参阅 date_floor