Help Center/ Data Lake Insight/ SQL Syntax Reference (To Be Offline)/ Spark SQL Syntax Reference (Unavailable Soon)/ Built-in Functions/ Date Functions/ hour
Updated on 2023-10-25 GMT+08:00
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hour

This function is used to return the hour (from 0 to 23) of a specified time.

Syntax

hour(string date)

Parameters

Table 1 Parameter

Parameter

Mandatory

Type

Description

date

Yes

DATE

or

STRING

Date that needs to be processed

The following formats are supported:

  • yyyy-mm-dd
  • yyyy-mm-dd hh:mi:ss
  • yyyy-mm-dd hh:mi:ss.ff3

Return Values

The return value is of the INT type.

  • 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);
Parent topic: Date Functions