Question

我有3个SQL Server 2005表，一个order表，quote表和invoice表，结构如下：

SO 表

Rep Code SO Amount SO Date
----------------------------
1         100     1/2/2015
2          50     2/15/2015
3          20     2/20/2015
2          50     2/20/2015
1          85     2/20/2015

SQ 表

Rep Code SQ Amount SQ Date
---------------------------
1        50        2/2/2015
2        14        2/18/2015
3        67        2/19/2015
1        96        2/20/2015
2        54        2/20/2015

INV 表

Rep Code INV Amount INV Date
-----------------------------
1         654      2/2/2015
2         312      2/18/2015
3          54      2/19/2015
1           6      2/20/2015
3          48      2/20/2015

我想要做的是编写一个查询，它将通过代码总结每个金额，所以它看起来像这样：

Rep Code SO Total SQ Total Inv Total
------------------------------------    
1        185      146      660
2        100       68      312
3        20        67      102

如果每个人的适当日期可以说是在上周，我还希望它只能提取总数。（所以今天-7）

如果需要澄清，请告诉我。

Answer 1

尝试使用FULL JOIN：

DECLARE @start_date DATE = '20150101', @end_date DATE = '20150223'

    SELECT  t.RepCode ,
    SUM(SoAmount) AS SoAmount ,
    SUM(SqAmount) AS SqAmount ,
    SUM(InvAmount) AS InvAmount
    FROM ( 
        SELECT  COALESCE(so.RepCode, sq.RepCode, inv.RepCode) AS RepCode ,
        ISNULL(so.SoAmount, 0) AS SoAmount ,
        ISNULL(sq.SqAmount, 0) AS SqAmount ,
        ISNULL(inv.InvAmount, 0) AS InvAmount
        FROM    ( SELECT    RepCode ,
                    SUM(SoAmount) AS SoAmount
          FROM      SO
          WHERE     SoDate >= @start_date
                    AND SoDate <= @end_date
          GROUP BY  RepCode
        ) so
        FULL JOIN ( SELECT  RepCode ,
                            SUM(SqAmount) AS SqAmount
                    FROM    SQ
                    WHERE   SqDate >= @start_date
                            AND SqDate <= @end_date
                    GROUP BY RepCode
                  ) sq ON so.RepCode = sq.RepCode
        FULL JOIN ( SELECT  RepCode ,
                            SUM(InvAmount) AS InvAmount
                    FROM    INV
                    WHERE   InvDate >= @start_date
                            AND InvDate <= @end_date
                    GROUP BY RepCode
                  ) inv ON inv.RepCode = sq.RepCode     
    ) t
    GROUP BY t.RepCode

SQL查询来自3个不同表的SUM数据

1 个答案: