删除包含连接表的记录

Question

我们是否可以使用下面的连接从表中删除记录而不使用IN

delete FROM Shippers
INNER JOIN Orders
ON Orders.Shipper_ID = Shippers.Shipper_ID
where Orders.Order_ID = 3

Answer 1

不，你不能。 你可以做的是使用EXISTS条款。 像这样：

DELETE FROM SHIPPERS S
WHERE EXISTS (SELECT 1 
              FROM ORDERS O
              WHERE S.SHIPPER_ID = O.SHIPPER_ID
              AND O.ORDER_ID = 3)