select * from `g5_shop_cart` a, `g5_shop_item` b where a.it_id = b.it_id and ct_time between '2020-02-09 00:00:00' and '2020-08-09 11:00:22' group by a.it_id order by it_order, it_id desc limit 0 , 40
1052 : Column 'it_id' in order clause is ambiguous
error file : /shop/listtype.php