在多个表上加入和取消透视

Question

我有两个 table：

更正table：

C_CORRECTIONS
CorrAmount  |HalfYear1  |HalfYear2  |Type   |REFNUM |
-----------------------------------------------------
1000        |50         |50         |HYINT  |R123   |

已收集Table:

P_COLLECTED
Amount      |Type   |Account    |REFNUM |
-----------------------------------------
1500        |TOTAL  |ACCT1      |R123   |
50          |HYINT  |ACCT2      |R123   |
50          |HYINT  |ACCT3      |R123   |

我需要的是：

CorrAmount  |Type   |Account    |REFNUM |
-----------------------------------------
1000        |TOTAL  |ACCT1      |R123   |
50          |HYINT  |ACCT2      |R123   |
50          |HYINT  |ACCT3      |R123   |

我试过以下：

SELECT DISTINCT C.AMT, P.ACCOUNT,C.REFNUM FROM (
SELECT U.AMT, U.Type, REFNUM
FROM C_CORRECTIONS
UNPIVOT
(
  AMT
  FOR INT_AMT IN (CorrAmount,HalfYear1,HalfYear2)
) U
) C
LEFT JOIN P_COLLECTED P
ON C.REFNUM = P.REFNUM AND C.AMT = P.Amount;

结果：

AMT     |ACCOUNT    |REFNUM |
--------|-----------|-------|
50      |ACCT2      |R123   |
50      |ACCT3      |R123   |
1000    |           |R123   |

编辑：好的。所以我使用了 left join 而不是 join，并输入了 distinct 并且我得到了主要金额，但我似乎还不能得到它的帐户。

Answer 1

您好，我已经在您的脚本中进行了修改，请验证

Select  Amount, 
        Type,
        'Acct' + CAST(ROW_NUMBER()OVER(PARTITION BY  Refnum  ORDER BY (Select  NULL))AS VARCHAR(20))Account,REFNUM 
                from  
            (Select Amount, Type, REFNUM from  @Table2 where type = 'Total'
                    UNION ALL
            SELECT C.AMT, C.Type,C.REFNUM FROM (
            SELECT U.AMT, U.Type, REFNUM
            FROM @Table1
            UNPIVOT
            (
              AMT
              FOR INT_AMT IN (CorrAmount,HalfYear1,HalfYear2)
            ) U
            ) C,@Table2 P
            WHERE C.REFNUM = P.REFNUM OR  C.AMT = P.Amount
            GROUP BY C.AMT, C.Type,C.REFNUM)T

Answer 2

您取消旋转 C_CORRECTIONS，然后加入 P_COLLECTED。

但也许您可以从 P_COLLECTED 开始并加入 C_CORRECTIONS。
由于 P_COLLECTED 已经有多行。

测试示例：

declare @P_COLLECTED table (Amount int, Type varchar(8), Account varchar(8), REFNUM varchar(8));
declare @C_CORRECTIONS table (CorrAmount int, HalfYear1 int, HalfYear2 int, Type varchar(8), REFNUM varchar(8));

insert into @P_COLLECTED (Amount, Type, Account, REFNUM) values
(1500,'TOTAL','ACCT1','R123'),
(50  ,'HYINT','ACCT2','R123'),
(50  ,'HYINT','ACCT3','R123');

insert into @C_CORRECTIONS (CorrAmount, HalfYear1, HalfYear2, Type, REFNUM) values
(1000,24,26,'HYINT','R123');

select 
(case when t.Type = 'TOTAL' then c.CorrAmount else t.Amount end) as Amount,
t.Type, t.Account, t.REFNUM
-- , c.*
from @P_COLLECTED t
left join @C_CORRECTIONS c 
      -- on (t.REFNUM = c.REFNUM and t.Type in ('TOTAL',c.Type));
      on (t.REFNUM = c.REFNUM and t.Type = 'TOTAL');

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