MySQL之You can't specify target table for update in FROM clause解决办法

做删除的时候遇到了这个问题

You can't specify target table for update in FROM clause 意思是：不能查询表中的字段并更新这些字段在同一张表中。

解决：在包一层就行了

错误sql：

DELETE 
FROM
    orders 
WHERE
    id IN (SELECT id FROM    orders)

改正sql：

DELETE 
FROM
    orders 
WHERE
    id IN (SELECT t.id FROM (SELECT id FROM    orders)t)