WEEKDAY(date)
返回日期星期索引 (0 = Monday, 1 = Tuesday, . 6 = Sunday).
mysql> SELECT WEEKDAY('1998-02-03 22:23:00'); +---------------------------------------------------------+ | WEEKDAY('1998-02-03 22:23:00') | +---------------------------------------------------------+ | 1 | +---------------------------------------------------------+ 1 row in set (0.00 sec)
