Description
Retrieves the hour information from a date.
The parameter can be of type Date, DateTime, or Time.
When the parameter is of type Date or DateTime, the return value ranges from 0 to 23. When the parameter is of type Time, the return value can exceed 24.
Syntax
INT HOUR(DATETIME date)
Example
mysql> select hour('2018-12-31 23:59:59');
+-----------------------------+
| hour('2018-12-31 23:59:59') |
+-----------------------------+
| 23 |
+-----------------------------+
mysql> select cast(4562632 as time),hour(cast(4562632 as time)), minute(cast(4562632 as time)),second(cast(4562632 as time));
+-----------------------+-----------------------------+-------------------------------+-------------------------------+
| cast(4562632 as TIME) | hour(cast(4562632 as TIME)) | minute(cast(4562632 as TIME)) | second(cast(4562632 as TIME)) |
+-----------------------+-----------------------------+-------------------------------+-------------------------------+
| 456:26:32 | 456 | 26 | 32 |
+-----------------------+-----------------------------+-------------------------------+-------------------------------+Keywords
HOUR