Mega Code Archive
WEEKOFYEAR(date) returns the calendar week of the date as a number in the range from 1 to 53
mysql>
mysql> SELECT WEEKOFYEAR('1998-02-20');
+--------------------------+
| WEEKOFYEAR('1998-02-20') |
+--------------------------+
| 8 |
+--------------------------+
1 row in set (0.00 sec)