Question

我有一个最初工作得很好的SQL代码，但后来我不得不在CASE中添加一个新项目，现在我的GROUP BY不会像以前一样完全组合在一起，这会弄乱我的计算。我甚至不想按照完成的日期进行分组，它只是针对一个案例，但如果我没有它，我的代码就会爆炸。

编辑：原始代码运行良好，但我必须添加完成的日期，以便我可以添加一个CASE，如果我不将它添加到GROUP BY，它会出错，所以我添加了它，现在它没有' t分组它在原始代码中的方式。这段代码的作用是从其他表中获取大量信息，它计算出有人欠多少钱，有多少人支付并吐出差异。

原始代码

INSERT INTO #ThisReportAll (CustomerID,Year,OverdueBalance,YearSetupId)
SELECT t.CustomerId, ys.Name AS Year,SUM(t.TtlSpeciesCost) - Isnull(cp.TtlPayments,0) + Isnull(ba.Amount,0) 
AS TtlOwnerCost, t.YearSetupId AS YearSetupId
FROM #TotalAnimalCostAll t
LEFT JOIN #CustomerPaymentsAll cp ON t.CustomerId=cp.CustomerID
LEFT JOIN YearSetup ys ON t.YearSetupId = ys.YearSetupId
LEFT JOIN #BalanceAdjustmentsAll ba ON t.CustomerId=ba.CustomerID
GROUP BY t.CustomerId,ys.Name,cp.TtlPayments, ba.Amount, t.YearSetupId

无法正常使用的新代码

INSERT INTO #ThisReportAll (CustomerID,Year,OverdueBalance,YearSetupId)
SELECT t.CustomerId, ys.Name AS Year, 
CASE 
        WHEN SUM(t.TtlSpeciesCost) < 5 AND t.Complete < CONVERT(DATE,'01-01-2017')
        THEN (5) - Isnull(cp.TtlPayments,0) + Isnull(ba.Amount,0) 
        ELSE SUM(t.TtlSpeciesCost) - Isnull(cp.TtlPayments,0) + Isnull(ba.Amount,0) 
END
AS TtlOwnerCost, t.YearSetupId AS YearSetupId
FROM #TotalAnimalCostAll t
LEFT JOIN #CustomerPaymentsAll cp ON t.CustomerId=cp.CustomerID
LEFT JOIN YearSetup ys ON t.YearSetupId = ys.YearSetupId
LEFT JOIN #BalanceAdjustmentsAll ba ON t.CustomerId=ba.CustomerID
GROUP BY t.CustomerId,ys.Name,cp.TtlPayments, ba.Amount, t.YearSetupId, t.Complete

Answer 1

我发现您还在新代码中按t.Complete分组，但在原始代码中没有分组。您的结果需要考虑到这一点，否则就会出错。

对我来说，Isnull(cp.TtlPayments,0) + Isnull(ba.Amount,0)在你的CASE语句中也很奇怪，但当语句在其他地方使用SUM时，它们不是聚合。

Answer 2

如果您不希望Complete影响您的GROUP BY，则需要在不选择CASE的子查询中执行Complete。然后，您不会在您要分组的数据中添加额外字段。像这样：

SELECT [whatever fields]
from
    (
    SELECT t.CustomerId, ys.Name AS Year, 
    CASE 
        WHEN SUM(t.TtlSpeciesCost) < 5 AND t.Complete < CONVERT(DATE,'01-01-2017')
        THEN (5) - Isnull(cp.TtlPayments,0) + Isnull(ba.Amount,0) 
        ELSE SUM(t.TtlSpeciesCost) - Isnull(cp.TtlPayments,0) + Isnull(ba.Amount,0) 
    END
    AS TtlOwnerCost, t.YearSetupId AS YearSetupId
    FROM #TotalAnimalCostAll t
    LEFT JOIN #CustomerPaymentsAll cp ON t.CustomerId=cp.CustomerID
    LEFT JOIN YearSetup ys ON t.YearSetupId = ys.YearSetupId
    LEFT JOIN #BalanceAdjustmentsAll ba ON t.CustomerId=ba.CustomerID
    ) as a
GROUP BY a.CustomerId, a.Name,a.TtlPayments, a.Amount, a.YearSetupId

SQL不会完全是GROUP BY

2 个答案: