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  • SQLServer 添加字段分组去除重复项,用临时表

    USE [DB]
     2 GO
     3 
     4 SELECT IDENTITY(INT,1,1) AS autoid
     5     , a.* 
     6 INTO [dbo].[##temp0] 
     7 FROM (SELECT DISTINCT c.CustomerId AS CustomerId
     8       ,t.TaxRule AS TaxRule
     9       FROM [dbo].[T] t
    10       JOIN [dbo].[C] c
    11       ON t.OldCHId = c.OldCHId
    12       JOIN [dbo].[CU] u
    13       ON c.CustomerId = u.CustomerId 
    14       --order by c.CustomerId
    15       ) AS a
    16 GO    
    17   
    18 SELECT MAX(autoid) AS autoid INTO [dbo].[##temp1] FROM [dbo].[##temp0] t0 GROUP BY t0.CustomerId      
    19 GO      
    20  
    21 DROP TABLE [dbo].[T]
    22 
    23 CREATE TABLE [dbo].[T]......
    24 
    25 GO
    26 
    27 INSERT INTO [dbo].[T] (CustomerId, TaxRule)
    28 (SELECT CustomerId, TaxRule FROM [dbo].[##temp0] WHERE autoid IN (SELECT autoid FROM [dbo].[##temp1]))
    29 GO
    30 
    31 select * from [dbo].[##temp0] order by CustomerId                                                  
    32 DROP TABLE [dbo].[##temp0]
    33           
    34 select * from [dbo].[##temp1] order by autoid                                              
    35 DROP TABLE [dbo].[##temp1]
    36 
    37 GO
    38 
    View Code
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  • 原文地址:https://www.cnblogs.com/RocCnBlog/p/3554211.html
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