Question

您好我有SQL脚本并尝试添加具有不同条件的额外列但无法使其工作。

Select
PUB_Name As 'Pub Name'
,SUM(PUB_Collected) AS Collected 
,Sum(PUB_Loyalty) As SumLoyalty 
,(CASE WHEN SUM(PUB_Collected)>0 THEN (SUM(PUB_Loyalty)/SUM(PUB_Collected))ELSE NULL END) AS 'Percentage'
,SUM(PUB_Lodged_To_Till) As SumLodged 
,Sum(PUB_Paid_Out) As SumPaidOut 
,SUM(PUB_Lodged_To_Till) - Sum(PUB_Paid_Out) As 'Profit/Lose' 
,SUM(PUB_Lodged_To_Till) - SUM(PUB_Paid_Out) - SUM(PUB_Loyalty) As 'Profit/Lose + Loyalty' 
FROM [MattPubsDB].[dbo].[PUBRecords] 
WHERE PUB_Date >= '2015-03-01'AND PUB_Date < '2015-06-01' 
Group By PUB_Name

我想得到这个专栏：

,SUM(PUB_Lodged_To_Till) - SUM(PUB_Paid_Out) - SUM(PUB_Loyalty) As 'Profit/Lose + Loyalty 2nd'

与不同的WHERE：

WHERE PUB_Date >= '2015-01-01'AND PUB_Date < '2015-06-01'

当我开始学习SQL时，我将不胜感激。

Answer 1

您将不得不使用条件聚合，这将影响您的所有聚合。查询将如下所示：

Select PUB_Name As `Pub Name`,
       SUM(CASE WHEN PUB_Date >= '2015-03-01'AND PUB_Date < '2015-06-01'  THEn PUB_Collected ELSE 0 END) AS Collected, 
       . . .
       SUM(CASE WHEN PUB_Date >= '2015-01-01'AND PUB_Date < '2015-06-01'
                THEN COALESCE(PUB_Lodged_To_Till, 0) - COALESCE(PUB_Paid_Out, 0) - COALESCE(PUB_Loyalty, 0) 
                ELSE 0
           END) As `Profit/Lose + Loyalty 2nd`

FROM [MattPubsDB].[dbo].[PUBRecords] 
Group By PUB_Name;

我建议你更改列别名，这样就不需要对它们进行转义（例如，没有空格）。如果您不想更改名称，请使用后退标记。尽管允许使用单引号，但它们往往会导致混淆，因为在其他任何地方都不允许使用列别名。

具有不同条件的额外柱

1 个答案: