WEEKOFYEAR(date)

返回日期用数字表示的范围是从1到53的日历周。WEEKOFYEAR()是一个兼容性函数，它等效于WEEK(date,3)。

mysql> SELECT WEEKOFYEAR('1998-02-20');
+---------------------------------------------------------+
| WEEKOFYEAR('1998-02-20')                                |
+---------------------------------------------------------+
| 8                                                       |
+---------------------------------------------------------+
1 row in set (0.00 sec)