Question

我正在使用两个不同的查询来获取数据。在这里，我已经使用union加入了。

SELECT
  IPOD.StockCode
 ,SUM(IPOD.OrderQty) / 12 AS newAverage
FROM
  InvPurchaseOrderHeader AS IPOH
  INNER JOIN
    InvPurchaseOrderDetail AS IPOD
      ON
      IPOH.InvPurchaseOrderHeaderID = IPOD.InvPurchaseOrderHeaderID
WHERE
  IPOH.DocumentStatus = 1
  AND IPOH.DocumentDate >= (DATEADD(MONTH, -12, GETDATE()))
GROUP BY
  IPOD.StockCode
UNION
SELECT
  IPOD.StockCode
 ,SUM(IPOD.OrderQty) / 6 AS newAverage
FROM
  InvPurchaseOrderHeader AS IPOH
  INNER JOIN
    InvPurchaseOrderDetail AS IPOD
      ON
      IPOH.InvPurchaseOrderHeaderID = IPOD.InvPurchaseOrderHeaderID
WHERE
  IPOH.DocumentStatus = 1
  AND IPOH.DocumentDate >= (DATEADD(MONTH, -6, GETDATE()))
GROUP BY
  IPOD.StockCode;

但是上面的查询需要总结类似的记录目前它给出这样的结果。

4846000001-M    20.000000
4846000001-M    40.000000
4846000001-S    10.000000
4846000001-S    20.000000

但是我需要这样的数据集

4846000001-M    60.000000
4846000001-S    30.000000

此外，我需要将每个结果行值除以3

最终数据集应如下所示。

4846000001-M    20.000000
4846000001-S    10.000000

我该如何实现？

Answer 1

您不需要两个查询。您可以将单独的列获取为：

select IPOD.StockCode,
       sum(case when IPOH.DocumentDate >= dateadd(month, -12, getdate()) then IPOD.OrderQty end)/12 as newAverage_12, 
       sum(case when IPOH.DocumentDate >= dateadd(month, -6, getdate()) then IPOD.OrderQty end)/6 as newAverage_6    
from InvPurchaseOrderHeader IPOH inner join
     InvPurchaseOrderDetail IPOD
     on IPOH.InvPurchaseOrderHeaderID = IPOD.InvPurchaseOrderHeaderID 
where IPOH.DocumentStatus = 1 
group by IPOD.StockCode;

您可以轻松地将它们加在一起并除以3。

编辑：

因此，您的特定问题的答案是：

select IPOD.StockCode,
       (sum(case when IPOH.DocumentDate >= dateadd(month, -12, getdate()) then IPOD.OrderQty end)/12 + 
        sum(case when IPOH.DocumentDate >= dateadd(month, -6, getdate()) then IPOD.OrderQty end)/6
       ) / 3
from InvPurchaseOrderHeader IPOH inner join
     InvPurchaseOrderDetail IPOD
     on IPOH.InvPurchaseOrderHeaderID = IPOD.InvPurchaseOrderHeaderID 
where IPOH.DocumentStatus = 1 
group by IPOD.StockCode;

Answer 2

您可以通过子查询来使用sum()函数，但条件汇总最好由@gordon先生回答

 select  t.StockCode,sum(newAverage)/3   from
(
select IPOD.StockCode, SUM(IPOD.OrderQty)/12 as newAverage from 

    InvPurchaseOrderHeader IPOH 
    INNER JOIN InvPurchaseOrderDetail IPOD on IPOH.InvPurchaseOrderHeaderID = IPOD.InvPurchaseOrderHeaderID 

    where IPOH.DocumentStatus = 1 AND IPOH.DocumentDate >= (DATEADD(MONTH, -12, GETDATE()))
    GROUP BY IPOD.StockCode

    union 

    select IPOD.StockCode, SUM(IPOD.OrderQty)/6 as newAverage from 

    InvPurchaseOrderHeader IPOH 
    INNER JOIN InvPurchaseOrderDetail IPOD on IPOH.InvPurchaseOrderHeaderID = IPOD.InvPurchaseOrderHeaderID 

    where IPOH.DocumentStatus = 1 AND IPOH.DocumentDate >= (DATEADD(MONTH, -6, GETDATE()))
    GROUP BY IPOD.StockCode)

) as t group by t.StockCode

Answer 3

我们也可以在此使用 avg（）函数

select  t.StockCode,avg(newAverage)   from
(
select IPOD.StockCode as stockcode, SUM(IPOD.OrderQty)/12 as newAverage from 

    InvPurchaseOrderHeader IPOH 
    INNER JOIN InvPurchaseOrderDetail IPOD on IPOH.InvPurchaseOrderHeaderID = IPOD.InvPurchaseOrderHeaderID 

    where IPOH.DocumentStatus = 1 AND IPOH.DocumentDate >= (DATEADD(MONTH, -12, GETDATE()))
    GROUP BY IPOD.StockCode

    union 

    select IPOD.StockCode as stockcode, SUM(IPOD.OrderQty)/6 as newAverage from 

    InvPurchaseOrderHeader IPOH 
    INNER JOIN InvPurchaseOrderDetail IPOD on IPOH.InvPurchaseOrderHeaderID = IPOD.InvPurchaseOrderHeaderID 

    where IPOH.DocumentStatus = 1 AND IPOH.DocumentDate >= (DATEADD(MONTH, -6, GETDATE()))
    GROUP BY IPOD.StockCode)

) as t group by t.StockCode

您还可以将和条款一起使用

with data as
(
select IPOD.StockCode as stockcode, SUM(IPOD.OrderQty)/12 as newAverage from 

    InvPurchaseOrderHeader IPOH 
    INNER JOIN InvPurchaseOrderDetail IPOD on IPOH.InvPurchaseOrderHeaderID = IPOD.InvPurchaseOrderHeaderID 

    where IPOH.DocumentStatus = 1 AND IPOH.DocumentDate >= (DATEADD(MONTH, -12, GETDATE()))
    GROUP BY IPOD.StockCode

    union 

    select IPOD.StockCode as stockcode, SUM(IPOD.OrderQty)/6 as newAverage from 

    InvPurchaseOrderHeader IPOH 
    INNER JOIN InvPurchaseOrderDetail IPOD on IPOH.InvPurchaseOrderHeaderID = IPOD.InvPurchaseOrderHeaderID 

    where IPOH.DocumentStatus = 1 AND IPOH.DocumentDate >= (DATEADD(MONTH, -6, GETDATE()))
    GROUP BY IPOD.StockCode)

),select stockcode,avg(newAverage) from data group by stockcode;

将两个不同查询的结果加在一起

3 个答案: