Returns the Week Number of the year from a date .
Syntax
WEEKOFYEAR(date)
Example
SELECT WEEKOFYEAR('2015-08-21')
Output is 34
By using CURDATE() we can get present week number of the year.
SELECT WEEKOFYEAR( CURDATE( ) )
For a invalid date we will get Null as output
SELECT WEEKOFYEAR('2015-02-31')
Output is NULL
WEEKDAY() function to get number from 0 to 6 based on Weekday in MySQL
Monday is the starting day of the week.
This function is same as WEEK() function when mode is equal to 3
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