MySQL HOUR() Function

Return the hour part of a datetime:

SELECT HOUR("2017-06-20 09:34:00");

Definition and Usage

The HOUR() function returns the hour part for a given date (from 0 to 838).

HOUR( datetime)

Parameter	Description
datetime	Required. The datetime value to extract the hour from

Works in:	From MySQL 4.0

Return the hour part of a datetime:

SELECT HOUR("838:59:59");