MySQL:

WEEKDAY

Syntax:
WEEKDAY(date)

Returns the weekday index for date (0 = Monday, 1 = Tuesday, ... 6 =
Sunday).

URL: https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html

mysql> SELECT WEEKDAY('2008-02-03 22:23:00');
-> 6
mysql> SELECT WEEKDAY('2007-11-06');
-> 1

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