HOUR

Description

获得日期中的小时的信息。

参数为 Date 或者 Datetime，Time 类型

当参数为 Date 或者 Datetime，返回值范围从 0-23。当参数为 Time，返回值可以大于 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