7 |
+-------------------------+

CREATE TABLE t1 (d DATETIME);
INSERT INTO t1 VALUES
  ("2007-01-30 21:31:07"),
  ("1983-10-15 06:42:51"),
  ("2011-04-21 12:34:56"),
  ("2011-10-30 06:31:41"),
  ("2011-01-30 14:03:25"),
  ("2004-10-07 11:19:34");

SELECT d, DAYNAME(d), DAYOFWEEK(d), WEEKDAY(d) from t1;
+---------------------+------------+--------------+------------+
| d                   | DAYNAME(d) | DAYOFWEEK(d) | WEEKDAY(d) |
+---------------------+------------+--------------+------------+
| 2007-01-30 21:31:07 | Tuesday    |            3 |          1 |
| 1983-10-15 06:42:51 | Saturday   |            7 |          5 |
| 2011-04-21 12:34:56 | Thursday   |            5 |          3 |
| 2011-10-30 06:31:41 | Sunday     |            1 |          6 |
| 2011-01-30 14:03:25 | Sunday     |            1 |          6 |
| 2004-10-07 11:19:34 | Thursday   |            5 |          3 |
+---------------------+------------+--------------+------------+

URL: https://mariadb.com/kb/en/dayofweek/https://mariadb.com/kb/en/dayofweek/