time_round

description

Syntax

DATETIME TIME_ROUND(DATETIME expr)

DATETIME TIME_ROUND(DATETIME expr, INT period)

DATETIME TIME_ROUND(DATETIME expr, DATETIME origin)

DATETIME TIME_ROUND(DATETIME expr, INT period, DATETIME origin)

The function name TIME_ROUND consists of two parts, Each part consists of the following optional values.

• TIME: SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, YEAR
• ROUND: FLOOR, CEIL

Returns the upper/lower bound of expr.

• period specifies how many TIME units, the default is 1.
• origin specifies the start time of the period, the default is 1970-01-01T00:00:00, the start time of WEEK is Sunday, which is 1970-01-04T00:00:00. Could be larger than expr.
• Please try to choose common period, such as 3 MONTH, 90 MINUTE. If you set a uncommon period, please also specify origin.

example

2. MySQL> SELECT YEAR_FLOOR('20200202000000');
3. +------------------------------+
4. | year_floor('20200202000000') |
5. +------------------------------+
6. | 2020-01-01 00:00:00          |
7. +------------------------------+

10. MySQL> SELECT MONTH_CEIL(CAST('2020-02-02 13:09:20' AS DATETIME), 3); --quarter
11. +--------------------------------------------------------+
12. | month_ceil(CAST('2020-02-02 13:09:20' AS DATETIME), 3) |
13. +--------------------------------------------------------+
14. | 2020-04-01 00:00:00                                    |
15. +--------------------------------------------------------+

18. MySQL> SELECT WEEK_CEIL('2020-02-02 13:09:20', '2020-01-06'); --monday
19. +---------------------------------------------------------+
20. | week_ceil('2020-02-02 13:09:20', '2020-01-06 00:00:00') |
21. +---------------------------------------------------------+
22. | 2020-02-03 00:00:00                                     |
23. +---------------------------------------------------------+

26. MySQL> SELECT MONTH_CEIL(CAST('2020-02-02 13:09:20' AS DATETIME), 3, CAST('1970-01-09 00:00:00' AS DATETIME)); --next rent day
27. +-------------------------------------------------------------------------------------------------+
28. | month_ceil(CAST('2020-02-02 13:09:20' AS DATETIME), 3, CAST('1970-01-09 00:00:00' AS DATETIME)) |
29. +-------------------------------------------------------------------------------------------------+
30. | 2020-04-09 00:00:00                                                                             |
31. +-------------------------------------------------------------------------------------------------+

keyword

TIME_ROUND