WEEKDAY(): function in a mysql date and time field

Returns the Day number within the week from a date .
Syntax

WEEKDAY(date)

Example

SELECT WEEKDAY('2016-09-21')

Output is 2
For a invalid date we will get Null as output

SELECT WEEKDAY('2015-02-31')

Output is NULL Output of WEEKDAY() function is from 0 to 6,
0 for Monday, 1 for Tuesday .... 6 for Sunday

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▼ Date & Time functions in SQL