Mysql从UNION ALL查询结果集中查询对应列出现错误"Every derived table must have its own alias"
在使用UNIONALL联合表的时候出现了出现了Everyderivedtablemusthaveitsownalias错误sql如下:SELECT*FROM(SELECT1CorpLevel,t.Operator_IdCorpId,t.Operator_NameCorpName,'1'CorpTypeFROMFd_OperatortUNIONALLSELECT2CorpLevel,t.Con_Id