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