MySql: 使用左连接从多个表中删除

Question

我有这个表：

订单：OrderId、UserId
订单商品：订单号、价格

OrderItems.OrderId 上有外键，有可能没有订单项。我想删除所有订单并为某些用户订购 ietms。这个 sql with inner join 工作正常：

DELETE o, oi 
FROM Orders o 
JOIN OrderItems oi ON o.OrderId = oi.OrderId 
WHERE o.UserId = 11

但它不会删除没有订单项的订单（内部联接）。但是 sql 使用左连接查询

DELETE o, oi 
FROM Orders o 
LEFT JOIN OrderItems oi ON o.OrderId = oi.OrderId 
WHERE o.UserId = 11

抛出错误

cannot update or delete parent row.

怎么了？是否可以在一次查询中删除用户的所有订单（有商品和无商品）？

Answer 1

Here解释为

If you use a multiple-table DELETE statement involving InnoDB tables for which there are foreign key constraints, the MySQL optimizer might process tables in an order that differs from that of their parent/child relationship. In this case, the statement fails and rolls back. Instead, you should delete from a single table and rely on the ON DELETE capabilities that InnoDB provides to cause the other tables to be modified accordingly

那我就用后续删除吧

MySql: 使用左连接从多个表中删除

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