Question

我正在使用以下代码，并希望从先前CASE中的SUM中提取列Total_Bank_Amount和Prog_Variance。

SELECT 
    b.Date, 
    SUM(p.Prog_Amount) AS Prog_Amount, 
    SUM(o.Credit_Amt) AS Outstanding, 
    CASE 
       WHEN b.Bank_Name Like '%Corp%' 
          THEN SUM(b.Credit_Amt) 
    END AS TMP_Amount,
    CASE 
       WHEN b.Bank_Name Like '%Cleo%' 
          THEN SUM(b.Credit_Amt) 
    END AS Cleo_Amount, 
    CASE 
       WHEN b.Bank_Name Like '%NY Bank%' 
          THEN SUM(b.Credit_Amt)
    END AS NY_Amount, 
    CASE 
       WHEN b.Bank_Name Like '%MA%' 
          THEN SUM(b.Credit_Amt) 
    END AS MA_Amount, 
    CASE 
       WHEN b.Bank_Name Like '%CT%' 
          THEN SUM(b.Credit_Amt) 
    END AS CT_Amount, 
    CASE 
       WHEN b.Bank_Name Like '%NY_SS%' 
          THEN SUM(b.Credit_Amt)
    END AS NY_SS_Amount, 
    CASE 
       WHEN b.Bank_Name LIKE '%VC_SS%' 
          THEN SUM(b.Credit_Amt)
    END AS VC_SS_Amount,
    (TMP_Amount + Cleo_Amount + NY_Amount + MA_Amount + CT_Amount + NY_SS_Amount + VC_SS_Amount) AS Total_Bank_Amount,
    (Prog_Amount + Outstanding - TMP_Amount - Cleo_Amount - NY_Amount - MA_Amount - CT_Amount - NY_SS_Amount - VC_SS_Amount) AS Prog_Variance
FROM 
    vw_Prog_Reference_Summary p
RIGHT JOIN 
    Bank_Detail b ON p.Bank_Reference_Number = b.Bank_Reference 
LEFT JOIN 
    vw_Outstanding_Form o ON b.Bank_Reference = o.Bank_Reference
LEFT JOIN 
    Exclusion e ON b.Bank_Reference = e.Exclude
WHERE 
    e.Exclude IS NULL
GROUP BY 
    b.Bank_Name, b.Date

问题是这些不是在他们解析时创建的，所以你如何解决这个问题？研究让我想出了什么=（。谢谢。

Answer 1

很遗憾，您无法在同一个select语句中引用列别名。通常，解决此问题的方法是使您的核心查询成为子查询，然后引用列别名，或者您可以在计算中再次重复相同的逻辑（因此您将再次在聚合计算中重复所有这些case和sum语句）。

以下链接供参考，因为之前已经提出过： this commit

Answer 2

尝试这样的事情：

SELECT
    (TMP_Amount + Cleo_Amount + NY_Amount + MA_Amount + CT_Amount + NY_SS_Amount + VC_SS_Amount) AS Total_Bank_Amount,
    (Prog_Amount + Outstanding - TMP_Amount - Cleo_Amount - NY_Amount - MA_Amount - CT_Amount - NY_SS_Amount - VC_SS_Amount) AS Prog_Variance
FROM (
    SELECT b.Date, Sum(p.Prog_Amount) AS Prog_Amount, Sum(o.Credit_Amt) AS Outstanding, 
        CASE WHEN b.Bank_Name Like '%Corp%' THEN SUM(b.Credit_Amt) END AS TMP_Amount,
        CASE WHEN b.Bank_Name Like '%Cleo%' THEN SUM(b.Credit_Amt) END AS Cleo_Amount, 
        CASE WHEN b.Bank_Name Like '%NY Bank%' THEN SUM(b.Credit_Amt)END AS NY_Amount, 
        CASE WHEN b.Bank_Name Like '%MA%' THEN SUM(b.Credit_Amt) END AS MA_Amount, 
        CASE WHEN b.Bank_Name Like '%CT%' THEN SUM(b.Credit_Amt) END AS CT_Amount, 
        CASE WHEN b.Bank_Name Like '%NY_SS%' THEN SUM(b.Credit_Amt)END AS NY_SS_Amount, 
        CASE WHEN b.Bank_Name Like '%VC_SS%' THEN SUM(b.Credit_Amt)END AS VC_SS_Amount
    FROM vw_Prog_Reference_Summary p
        RIGHT JOIN Bank_Detail b ON p.Bank_Reference_Number = b.Bank_Reference 
        LEFT JOIN vw_Outstanding_Form o ON b.Bank_Reference = o.Bank_Reference
        LEFT JOIN Exclusion e ON b.Bank_Reference = e.Exclude
    WHERE e.Exclude Is Null
    GROUP BY b.Bank_Name, b.Date
) t

我将旧查询移动到子查询，以便您可以使用所需的值。我还移动了Total_Bank_Amount和Prog_Variance之外的摘要。

Answer 3

我认为您正在寻找条件聚合：

SELECT b.Date, Sum(p.Prog_Amount) AS Prog_Amount, Sum(o.Credit_Amt) AS Outstanding, 
       SUM(CASE WHEN b.Bank_Name Like '%Corp%' THEN b.Credit_Amt END) AS TMP_Amount,
      . . .
FROM . . .
GROUP BY b.Date;

也就是说，您希望CASE作为SUM()的参数，而不是相反。

这（合理地）假设您实际上并不想为每个银行分别设置一个行，而只需要汇总的信息。

Answer 4

阅读Rollup, Cube and Grouping Sets。这将为您提供相同选择中的总和（如果这是您想要的），但您必须考虑NULL值。

或者，您可以UNION使用WITH，如下所示：

With SummaryData As
(
    SELECT 
        b.Date, Sum(p.Prog_Amount) AS Prog_Amount, Sum(o.Credit_Amt) AS Outstanding, 
        CASE WHEN b.Bank_Name Like '%Corp%' THEN SUM(b.Credit_Amt) END AS TMP_Amount,
        CASE WHEN b.Bank_Name Like '%Cleo%' THEN SUM(b.Credit_Amt) END AS Cleo_Amount, 
        CASE WHEN b.Bank_Name Like '%NY Bank%' THEN SUM(b.Credit_Amt)END AS NY_Amount, 
        CASE WHEN b.Bank_Name Like '%MA%' THEN SUM(b.Credit_Amt) END AS MA_Amount, 
        CASE WHEN b.Bank_Name Like '%CT%' THEN SUM(b.Credit_Amt) END AS CT_Amount, 
        CASE WHEN b.Bank_Name Like '%NY_SS%' THEN SUM(b.Credit_Amt)END AS NY_SS_Amount, 
        CASE WHEN b.Bank_Name Like '%VC_SS%' THEN SUM(b.Credit_Amt)END AS VC_SS_Amount,
        (TMP_Amount + Cleo_Amount + NY_Amount + MA_Amount + CT_Amount + NY_SS_Amount + VC_SS_Amount) AS Total_Bank_Amount,
        (Prog_Amount + Outstanding - TMP_Amount - Cleo_Amount - NY_Amount - MA_Amount - CT_Amount - NY_SS_Amount - VC_SS_Amount) AS Prog_Variance
    FROM vw_Prog_Reference_Summary p
    RIGHT JOIN Bank_Detail b 
        ON p.Bank_Reference_Number = b.Bank_Reference 
    LEFT JOIN vw_Outstanding_Form o 
        ON b.Bank_Reference = o.Bank_Reference
    LEFT JOIN Exclusion e 
        ON b.Bank_Reference = e.Exclude
    WHERE e.Exclude Is Null
    GROUP BY b.Bank_Name, b.Date
)

Select *
From SummaryData 

Union All

SELECT
    Date,
    0 Prog_Amount,
    0 Outstanding,
    0 TMP_Amount,
    0 Cleo_Amount,
    0 NY_Amount,
    0 MA_Amount,
    0 CT_Amount,
    0 NY_SS_Amount,
    0 VC_SS_Amount,
    Sum (Total_Bank_Amount) Total_Bank_Amount,
    Sum (Prog_Variance) Prog_Variance
FROM SummaryData
Group By
    Date

尝试使用select中的列命名在SELECT语句中创建的SUM列

4 个答案: