Help Center> Data Lake Insight> Spark SQL Syntax Reference> Built-In Functions> Date Functions> weekofyear
Updated on 2023-10-25 GMT+08:00
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weekofyear

This function is used to return the week number (from 0 to 53) of a specified date.

Syntax

weekofyear(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 33 is returned.

select weekofyear('2023-08-16 10:54:36');

The value NULL is returned.

select weekofyear('20230816');

The value NULL is returned.

select weekofyear(null);
Parent topic: Date Functions