WEEKDAY Function and WEEKOFYEAR Function in MariaDB

1. WEEKDAY Function : In MariaDB, The Weekday Function returns the weekday index for a date. In this function, the first parameter will be the Date value. This function returns the weekday index for a date. In WEEKDAY function returns the index value of the weekday given a date value. It works opposite to the DAYNAME function. And index values are as follows.

0=Monday, 
1=Tuesday, 
2=Wednesday, 
3=Thursday, 
4=Friday, 
5=Saturday, 
6=Sunday 

Syntax :

WEEKDAY( date_value )

Parameter :

• Date Value -Date or datetime value from which to extract the weekday index.

Return : It will return the time portion of a DateTime expression. Example-1 :

SELECT WEEKDAY('2014-05-20');

Output :

1

Example-2 : The curdate() function return the current system date. Today is Friday so it will return 5.

SELECT WEEKDAY(CURDATE()); 

Output :

5

2. WEEKOFYEAR function : In MariaDB, WEEKOFYEAR function is used to return the week of the year for a date value. In this function, the first parameter will be the date value. This function returns the week of the year (a number from 1 to 53) given a date value. This function assumes that the first day of the week is Monday and the first week has more than 3 days. WEEKOFYEAR function returns the same as the WEEK function with the syntax of WEEK(date_value,3). Syntax :

WEEKOFYEAR( date_value )

Parameters :

• date value -Date or DateTime value from which to extract the week of the year.

Return : It returns the week of the year for a date value. Example-1 :

SELECT WEEKOFYEAR('2020-01-01');

Output :

1