[Err] 1248 - Every derived table must have its own alias

原SQL语句为

delete from data_detail where data_detail.id in (select * from (select id from data_detail where keyWord_CN not like "%小麦%"))

一般在多表查询时，会出现此错误。每个派生出来的表都必须有一个自己的别名。

进行嵌套查询的时候子查询出来的的结果是作为一个派生表来进行上一级的查询的，所以子查询的结果必须要有一个别名

加个别名问题就解决了！！！

修改之后的sql

delete from data_detail where data_detail.id in (select * from (select id from data_detail where keyWord_CN not like "%小麦%") as t)