hour¶
This function is used to return the hour (from 0 to 23) of a specified time.
Syntax¶
hour(string date)
Parameters¶
Parameter | Mandatory | Type | Description |
|---|---|---|---|
date | Yes | DATE or STRING | Date that needs to be processed The following formats are supported:
|
Return Values¶
The return value is of the INT type.
Note
If the value of date is not of the DATE or STRING type, the error message "data type mismatch" is displayed.
If the value of date is of the DATE or STRING type but is not in one of the supported formats, NULL is returned.
If the value of date is NULL, NULL is returned.
Example Code¶
The value 10 is returned.
select hour('2023-08-10 10:54:00');
The value 12 is returned.
select hour('12:00:00');
The value NULL is returned.
select hour('20230810105600');
The value NULL is returned.
select hour(null);