hour
Description
Returns the hour for a given date. The return value ranges from 0 to 23.
The date
parameter must be of the DATE or DATETIME type.
Syntax
INT HOUR(DATETIME|DATE date)
Examples
MySQL > select hour('2018-12-31 23:59:59');
+-----------------------------+
| hour('2018-12-31 23:59:59') |
+-----------------------------+
| 23 |
+-----------------------------+
keyword
HOUR