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"
2017-04-20 11:31
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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：
出现如下错误：
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： 1248 Every 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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