如何使用CASE那么聚合SELECT与GROUP BY内部？

时间：2014-02-19 19:11:38

标签： sql sql-server tsql sql-server-2012

我有一个聚合的GROUP BY查询，在我添加CASE语句之前一直运行良好。添加后我收到此错误：

"Column 'gym.SalesDocumentItems.SalesDocumentItemStatusID' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause."

以下是查询：

select 
    a.AccountID, 
    isnull(sum(sdi.TotalAmount),0) AS Amount,
    isnull(sum(sdi.TotalDiscountAmount),0) AS Discount,
    isnull(sum(sdi.TaxAmount),0) AS TaxAmount, 
    isnull(sum(sdi.TaxDiscountAmount),0) AS TaxDiscountAmount, 
    isnull(sum(sdi.AmountPaid),0) AS AmountPaid,
    isnull(a.CreditAmountAvailable,0) * -1 AS Credit,
    CASE WHEN sdi.SalesDocumentItemStatusID IN(1,3) THEN
        isnull(sum(sdi.TotalAmount),0) - isnull(sum(sdi.TotalDiscountAmount),0) + isnull(sum(sdi.TaxAmount),0) - isnull(sum(sdi.TaxDiscountAmount),0) - isnull(sum(sdi.AmountPaid),0) - isnull(a.CreditAmountAvailable,0)
    ELSE
        -isnull(a.CreditAmountAvailable,0)
    END
    AS Balance,
    r.RunningBalanceTotal,
    isnull(sum(sdi.TotalAmount),0) - isnull(sum(sdi.TotalDiscountAmount),0) + isnull(sum(sdi.TaxAmount),0) - isnull(sum(sdi.TaxDiscountAmount),0) - isnull(sum(sdi.AmountPaid),0) - isnull(a.CreditAmountAvailable,0) - r.RunningBalanceTotal AS Difference,
    isnull(a.CreditAmountAvailable,0) AS AccountCredit
from gym.Account a
join gym.SalesDocument sd
on a.AccountID = sd.AccountID
join gym.SalesDocumentItems sdi
on sd.salesdocumentid = sdi.salesdocumentid
join RunningBalanceTotals r
on a.AccountID = r.AccountID
group by a.AccountID, a.CreditAmountAvailable, r.RunningBalanceTotal

我不知道如何实现这一目标。我需要case语句，以便select对不同的情况有不同的行为。对于sdi.SalesDocumentItemStatusID IN（1,3）的任何记录，我需要完整的计算;否则我只需要CreditAmountAvailable的否定。

我怎样才能做到这一点？我正在使用MS SQL Server 2012。

[[编辑]]

以下是基于Frank的查询的修改后的查询：

WITH ungrouped as (
    SELECT a.AccountID, 
           sdi.TotalAmount,
           CASE WHEN sdi.SalesDocumentItemStatusID IN(1,3) THEN 1 ELSE 2 END AS method,
           sdi.TaxAmount,
           sdi.TotalDiscountAmount,
           sdi.TaxDiscountAmount,
           sdi.AmountPaid,
           a.CreditAmountAvailable,
           r.RunningBalanceTotal
      from gym.Account a
      join gym.SalesDocument sd
      on a.AccountID = sd.AccountID
      join gym.SalesDocumentItems sdi
      on sd.salesdocumentid = sdi.salesdocumentid
      join RunningBalanceTotals r
      on a.AccountID = r.AccountID
)
SELECT ungrouped.AccountID, 
       CASE WHEN ungrouped.method = 1 THEN
            isnull(sum(ungrouped.TotalAmount),0) - isnull(sum(ungrouped.TotalDiscountAmount),0) + isnull(sum(ungrouped.TaxAmount),0) - isnull(sum(ungrouped.TaxDiscountAmount),0) - isnull(sum(ungrouped.AmountPaid),0) - isnull(ungrouped.CreditAmountAvailable,0)
       ELSE
            -isnull(ungrouped.CreditAmountAvailable,0)
       END AS Balance,
       ungrouped.RunningBalanceTotal,
       isnull(sum(ungrouped.TotalAmount),0) - isnull(sum(ungrouped.TotalDiscountAmount),0) + isnull(sum(ungrouped.TaxAmount),0) - isnull(sum(ungrouped.TaxDiscountAmount),0) - isnull(sum(ungrouped.AmountPaid),0) - isnull(ungrouped.CreditAmountAvailable,0) - ungrouped.RunningBalanceTotal AS Difference,
       isnull(ungrouped.CreditAmountAvailable,0) AS Credit
  FROM ungrouped
  where ungrouped.AccountID IN (    4238534,    4231337,    4132170, 4100923, 4137728, 4143255,     4230150, 4238565 
  )
GROUP BY ungrouped.AccountID, ungrouped.CreditAmountAvailable, ungrouped.RunningBalanceTotal, ungrouped.method
ORDER BY ungrouped.AccountID

2 个答案:

答案 0 :(得分：1)

首先获取所有列并包含CASE逻辑的第一部分，但没有分组到CTE中，我称之为ungrouped。然后，进行分组并在GROUP BY中包含CTE的CASE结果：

    WITH ungrouped as (
    SELECT a.AccountID, 
           sdi.TotalAmount,
           CASE WHEN sdi.SalesDocumentItemStatusID IN(1,3) THEN 1 ELSE 2 END AS method,
           sdi.TaxAmount,
           sdi.TotalDiscountAmount,
           sdi.TaxDiscountAmount,
           sdi.AmountPaid,
           a.CreditAmountAvailable,
           r.RunningBalanceTotal
      from gym.Account a
      join gym.SalesDocument sd
      on a.AccountID = sd.AccountID
      join gym.SalesDocumentItems sdi
      on sd.salesdocumentid = sdi.salesdocumentid
      join RunningBalanceTotals r
      on a.AccountID = r.AccountID
)
SELECT ungrouped.AccountID, 
       isnull(sum(ungrouped.TotalAmount),0) AS Amount,
       isnull(sum(ungrouped.TotalDiscountAmount),0) AS Discount,
       isnull(sum(ungrouped.TaxAmount),0) AS TaxAmount, 
       isnull(sum(ungrouped.TaxDiscountAmount),0) AS TaxDiscountAmount, 
       isnull(sum(ungrouped.AmountPaid),0) AS AmountPaid,
       isnull(ungrouped.CreditAmountAvailable,0) * -1 AS Credit,
       CASE WHEN ungrouped.method = 1 THEN
            isnull(sum(ungrouped.TotalAmount),0) - isnull(sum(ungrouped.TotalDiscountAmount),0) + isnull(sum(ungrouped.TaxAmount),0) - isnull(sum(ungrouped.TaxDiscountAmount),0) - isnull(sum(ungrouped.AmountPaid),0) - isnull(ungrouped.CreditAmountAvailable,0)
            ELSE
                -isnull(ungrouped.CreditAmountAvailable,0)
       END AS Balance,
       ungrouped.RunningBalanceTotal,
       isnull(sum(ungrouped.TotalAmount),0) - isnull(sum(ungrouped.TotalDiscountAmount),0) + isnull(sum(ungrouped.TaxAmount),0) - isnull(sum(ungrouped.TaxDiscountAmount),0) - isnull(sum(ungrouped.AmountPaid),0) - isnull(ungrouped.CreditAmountAvailable,0) - ungrouped.RunningBalanceTotal AS Difference,
       isnull(ungrouped.CreditAmountAvailable,0) AS AccountCredit
  FROM ungrouped
GROUP BY ungrouped.AccountID, ungrouped.CreditAmountAvailable, ungrouped.RunningBalanceTotal, ungrouped.method

答案 1 :(得分：0)

查看原始问题的评论，如果sdi.SalesDocumentItemStatusID与1或3不同，我看到要求在求和中使用零。可以通过拖动CASE来处理进入总结：

select 
    a.AccountID, 
    isnull(sum(sdi.TotalAmount),0) AS Amount,
    isnull(sum(sdi.TotalDiscountAmount),0) AS Discount,
    isnull(sum(sdi.TaxAmount),0) AS TaxAmount, 
    isnull(sum(sdi.TaxDiscountAmount),0) AS TaxDiscountAmount, 
    isnull(sum(sdi.AmountPaid),0) AS AmountPaid,
    isnull(a.CreditAmountAvailable,0) * -1 AS Credit,

      isnull(sum(CASE WHEN sdi.SalesDocumentItemStatusID IN(1,3) THEN sdi.TotalAmount ELSE 0 END),0)
    - isnull(sum(CASE WHEN sdi.SalesDocumentItemStatusID IN(1,3) THEN sdi.TotalDiscountAmount ELSE 0 END),0)
    + isnull(sum(CASE WHEN sdi.SalesDocumentItemStatusID IN(1,3) THEN sdi.TaxAmount ELSE 0 END),0)
    - isnull(sum(CASE WHEN sdi.SalesDocumentItemStatusID IN(1,3) THEN sdi.TaxDiscountAmount ELSE 0 END),0)
    - isnull(sum(CASE WHEN sdi.SalesDocumentItemStatusID IN(1,3) THEN sdi.AmountPaid ELSE 0 END),0)
    - isnull(a.CreditAmountAvailable,0)
    AS Balance,

    r.RunningBalanceTotal,
    isnull(sum(sdi.TotalAmount),0) - isnull(sum(sdi.TotalDiscountAmount),0) + isnull(sum(sdi.TaxAmount),0) - isnull(sum(sdi.TaxDiscountAmount),0) - isnull(sum(sdi.AmountPaid),0) - isnull(a.CreditAmountAvailable,0) - r.RunningBalanceTotal AS Difference,
    isnull(a.CreditAmountAvailable,0) AS AccountCredit
from gym.Account a
join gym.SalesDocument sd
on a.AccountID = sd.AccountID
join gym.SalesDocumentItems sdi
on sd.salesdocumentid = sdi.salesdocumentid
join RunningBalanceTotals r
on a.AccountID = r.AccountID
group by a.AccountID, a.CreditAmountAvailable, r.RunningBalanceTotal
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