mysql - 删除 ID 最小的帖子 SQL

Question

Delete from post 
where id_post 
in 
( 
    select MIN(id_post)
    from post
    where id_owner='2'
)

返回: “您不能在 FROM 子句中指定要更新的目标表‘post’”

我做错了什么？

Answer 1

问题是 MySQL，如果你在表上执行更新/插入/删除，你不能在内部查询中引用该表(但是你可以引用外部表中的字段...)

解决方法是将子查询中post的实例替换为(select MIN(id_post) 从邮寄 其中 id_owner='2' )，像这样

Delete from post 
where id_post 
in 
( 
    select id_post 
    from (select MIN(id_post)
    from post
    where id_owner='2') as A
)