QUARTER(date)
Returns the quarter of the year for date, in the range 1 to 4. Returns 0 if month contains a zero value, or NULL if the given value is not otherwise a valid date (zero values are accepted).
SELECT QUARTER('2008-04-01');
+-----------------------+
| QUARTER('2008-04-01') |
+-----------------------+
| 2 |
+-----------------------+
SELECT QUARTER('2019-00-01');
+-----------------------+
| QUARTER('2019-00-01') |
+-----------------------+
| 0 |
+-----------------------+
© 2019 MariaDB
Licensed under the Creative Commons Attribution 3.0 Unported License and the GNU Free Documentation License.
https://mariadb.com/kb/en/quarter/