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, second 或者 microsecond

Example

mysql> select extract(year from '2022-09-22 17:01:30') as year,
    -> extract(month from '2022-09-22 17:01:30') as month,
    -> extract(day from '2022-09-22 17:01:30') as day,
    -> extract(hour from '2022-09-22 17:01:30') as hour,
    -> extract(minute from '2022-09-22 17:01:30') as minute,
    -> extract(second from '2022-09-22 17:01:30') as second,
    -> extract(microsecond from cast('2022-09-22 17:01:30.000123' as datetimev2(6))) as microsecond;
+------+-------+------+------+--------+--------+-------------+
| year | month | day  | hour | minute | second | microsecond |
+------+-------+------+------+--------+--------+-------------+
| 2022 |     9 |   22 |   17 |      1 |     30 |         123 |
+------+-------+------+------+--------+--------+-------------+

keywords

extract