SQL查询以获取按另一列分组的值的总和

Question

我有这样的结果：

我目前使用的查询是：

SELECT TOP 1000 [FundReportLoanDataID]
      ,[SegAmortisation]
      ,frlc.FundReportCategoryId,
      SUM(CurrentLB) AS '% of Fund'
  FROM [dbo].[FundReportLoanData] frld
  INNER JOIN [dbo].[FundReportCategories] frlc
  ON frld.SegAmortisation = frlc.Description
    group by frlc.FundReportCategoryId, frld.SegAmortisation, frld.FundReportLoanDataID, frld.LoanId, frld.CurrentLB

正如您所看到的，虽然我正在通过FundReportCategoryId进行分组，但是有多个具有相同ID的结果，但我希望所有这些结果都基于FundReportCategoryId放入一个总和结果中。

为了达到我想要的目的，我需要改变什么？

Answer 1

您尝试汇总CurrentLB并在Group by中添加了相同的列，这也是重复的原因。从frld.CurrentLB

中删除Group by

此外，您需要从FundReportLoanDataID和SELECT移除group by，因为每行的数据看起来都是唯一的。

...
group by frld.SegAmortisation, 
         frld.FundReportLoanDataID

也从frld.LoanId删除Group By因为您没有选择它也可能是重复的原因

Answer 2

如果我理解正确，您正在寻找每个FundReportCategoryId的百分比。如果是这样，您可以使用窗口函数

SELECT TOP 1000 [FundReportLoanDataID]
      ,[SegAmortisation]
      ,frlc.FundReportCategoryId,
      SUM(CurrentLB)/SUM(CurrentLB) OVER(PARTITION BY frlc.FundReportCategoryId ) AS '% of Fund'
  FROM [dbo].[FundReportLoanData] frld
  INNER JOIN [dbo].[FundReportCategories] frlc
  ON frld.SegAmortisation = frlc.Description
  group by frlc.FundReportCategoryId, frld.SegAmortisation, frld.FundReportLoanDataID, frld.LoanId, frld.CurrentLB

Answer 3

尝试一下

    SELECT TOP 1000 
        [SegAmortisation],
        frlc.FundReportCategoryId,
        SUM(CurrentLB) AS '% of Fund'
    FROM [dbo].[FundReportLoanData] frld
    INNER JOIN [dbo].[FundReportCategories] frlc
        ON frld.SegAmortisation = frlc.Description
    GROUP BY frld.SegAmortisation, frlc.FundReportCategoryId

下次请提供您想要的输出:)