q("DELETE FROM `contact` WHERE `uid` = %d", intval($uid));
q("DELETE FROM `group` WHERE `uid` = %d", intval($uid));
q("DELETE FROM `group_member` WHERE `uid` = %d", intval($uid));
q("DELETE FROM `contact` WHERE `uid` = %d", intval($uid));
q("DELETE FROM `group` WHERE `uid` = %d", intval($uid));
q("DELETE FROM `group_member` WHERE `uid` = %d", intval($uid));