$match_id = 123; // this is the value to be updated
$update_item_number = "(3,4,5)"; // this is the id no where the value to be updated
//update query
$orders = "UPDATE orders SET item_number='$match_id' WHERE order_id IN'".$update_item_number ."'";
mysql_query($orders);
此查询未更新,我被困在这里请帮助我...