SQL服务器重复加入问题 [英] SQl server duplicate joins issue

问题描述

任何人都可以帮忙:我试图加入重复的值，但它不是我想要的.

can anyone please help: I tried to join with duplicate values but it is not coming as I wanted.

CREATE TABLE #TestTable1 ([No] varchar(50),[Value1] float,[Desc] varchar(50))
insert into #TestTable1 ([No],[Value1],[Desc])
Values 
 (N'123953',427.2,N'Basic Hours')
,(N'123953',106.8,N'Basic Hours')
,(N'123953',213.6,N'Basic Hours')
,(N'123953',213.6,N'Basic Hours')
,(N'123953',213.6,N'Basic Hours')
,(N'123953',213.6,N'Basic Hours')
,(N'123953',105.6,N'Basic Hours')


CREATE TABLE #TestTable2 ([No] varchar(50),[Value2] float,[Desc] varchar(50))
insert into #TestTable2 ([No],[Value2],[Desc])
Values 
 (N'123953',553.02,N'Basic Hours')
,(N'123953',446.67,N'Basic Hours')
,(N'123953',427.2,N'Basic Hours')
,(N'123953',106.8,N'Basic Hours')
,(N'123953',213.6,N'Basic Hours')
,(N'123953',213.6,N'Basic Hours')
,(N'123953',213.6,N'Basic Hours')
,(N'123953',105.6,N'Basic Hours')

期望的输出:

 [No],[Desc],[Value1],[Value2]

 (N'123953',N'Basic Hours',427.2,427.2)
,(N'123953',N'Basic Hours',106.8,106.8)
,(N'123953',N'Basic Hours',213.6,213.6)
,(N'123953',N'Basic Hours',213.6,213.6)
,(N'123953',N'Basic Hours',213.6,213.6)
,(N'123953',N'Basic Hours',213.6,NULL)
,(N'123953',N'Basic Hours',105.6,105.6)

注意:由于其他原因，我无法加入 Value 字段.

Note: I can't join on Value field for other reasons.

我尝试使用 row_number() 但仍然不是我想要的输出.提前致谢.

I tried to use row_number() but still not coming as my desired output. Thanks in advance.

推荐答案

这看起来如何?

WITH Table1
AS
(
    SELECT  T1.No,
            T1.[Desc],
            T1.Value1,
            CAST(T1.Value1 AS VARCHAR) + '~' + CAST(ROW_NUMBER() OVER (PARTITION BY T1.No, T1.Value1 ORDER BY T1.Value1 ASC) AS VARCHAR(2)) AS RN
    FROM    @TestTable1 AS T1
),
Table2
AS
(
    SELECT  T2.No,
            T2.[Desc],
            T2.Value2,
            CAST(T2.Value2 AS VARCHAR) + '~' + CAST(ROW_NUMBER() OVER (PARTITION BY T2.No, T2.Value2 ORDER BY T2.Value2 ASC) AS VARCHAR(2)) AS RN
    FROM    @TestTable2 AS T2
)
SELECT  T.No,
        T.[Desc],
        T.Value1,
        T2.Value2
FROM    Table1 AS T
LEFT
JOIN    Table2 AS T2
        ON  T.No = T2.No
            AND T.RN = T2.RN;

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