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"
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在使用UNION ALL联合表的时候出现了出现了Every derived table must have its own alias 错误
sql如下:
SELECT * FROM (SELECT 1 CorpLevel,t.Operator_Id CorpId,t.Operator_Name CorpName,'1' CorpType FROM Fd_Operator t UNION ALL SELECT 2 CorpLevel,t.Con_Id CorpId,t.Con_Name CorpName,'2' CorpType FROM Fd_Consignor t UNION ALL SELECT 2 CorpLevel,t.Carrier_Id CorpId,t.Carrier_Name CorpName,'3' CorpType FROM Fd_Carrier t UNION ALL SELECT 3 CorpLevel,t.Ssa_Id CorpId,t.Ssa_Name CorpName,'4' CorpType FROM Fd_SupplySalesagency t) WHERE CorpId='129'
出现如下错误:
1 queries executed, 0 success, 1 errors, 0 warnings查询:select * from (select 1 CorpLevel,t.Operator_Id CorpId,t.Operator_Name CorpName,'1' CorpType from Fd_Operator t union all select...错误代码: 1248Every derived table must have its own alias执行耗时 : 0 sec传送时间 : 0 sec总耗时 : 0.001 sec错误信息解析:
Every derived table must have its own alias每个派生表必须有自己的别名修改后的sql:
SELECT * FROM (SELECT 1 CorpLevel,t.Operator_Id CorpId,t.Operator_Name CorpName,'1' CorpType FROM Fd_Operator t UNION ALL SELECT 2 CorpLevel,t.Con_Id CorpId,t.Con_Name CorpName,'2' CorpType FROM Fd_Consignor t UNION ALL SELECT 2 CorpLevel,t.Carrier_Id CorpId,t.Carrier_Name CorpName,'3' CorpType FROM Fd_Carrier t UNION ALL SELECT 3 CorpLevel,t.Ssa_Id CorpId,t.Ssa_Name CorpName,'4' CorpType FROM Fd_SupplySalesagency t) AS a WHERE a.CorpId='129'
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