extract

description

Syntax

INT extract(unit FROM DATETIME)

提取DATETIME某个指定单位的值。单位可以为year, month, day, hour, minute或者second

Example

1. mysql> select extract(year from '2022-09-22 17:01:30') as year,
2. -> extract(month from '2022-09-22 17:01:30') as month,
3. -> extract(day from '2022-09-22 17:01:30') as day,
4. -> extract(hour from '2022-09-22 17:01:30') as hour,
5. -> extract(minute from '2022-09-22 17:01:30') as minute,
6. -> extract(second from '2022-09-22 17:01:30') as second;
7. +------+-------+------+------+--------+--------+
8. | year | month | day  | hour | minute | second |
9. +------+-------+------+------+--------+--------+
10. | 2022 |     9 |   22 |   17 |      1 |     30 |
11. +------+-------+------+------+--------+--------+

keywords

1. extract