SQL Server Case 语句和聚合函数

Question

我有以下表格数据:

SELECT [Quote ID], [Deductible Plan], [Age ID], [Number of Members] 
FROM finalResult_001

1381    $750 Deductible Plan    Age 65      10
1381    $750 Deductible Plan    Age 85+     10
1371    $150 Deductible Plan    Age 65      10
1371    $150 Deductible Plan    Age 85+     10

我正在寻找以下结果:

Quote ID Deductible Plan       Age 65      Age 85+
1381    $750 Deductible Plan    10          10
1371    $150 Deductible Plan    10          10

我想按报价 ID 和免赔额计划进行分组，并应按年龄 ID 列求和，但我不知道该怎么做，这是我的尝试:

SELECT [Quote ID], [Deductible Plan],

case when [Age ID] = 'Age 65' THEN SUM([Number of Members]) else 0 END AS [Age 65],   
case when [Age ID] = 'Age 85+' THEN SUM([Number of Members]) else 0 END AS [Age 85+]

FROM finalResult_001
GROUP BY [Quote ID], [Age ID], [Deductible Plan]

结果:

Quote ID Deductible Plan        Age 65      Age 85+
1381    $750 Deductible Plan    0           10
1381    $750 Deductible Plan    10          0
1371    $150 Deductible Plan    0           10
1371    $150 Deductible Plan    10          0

我如何对年龄 ID 进行求和来得到结果:

Quote ID Deductible Plan        Age 65      Age 85+
1381    $750 Deductible Plan    10          10
1371    $150 Deductible Plan    10          10

Answer 1

将 CASE 应用于 [Number of Members] 而不是 SUM([Number of Members])，并且不按 [Age ID]:

SELECT
  [Quote ID],
  [Deductible Plan],
  SUM(case when [Age ID] = 'Age 65'  THEN [Number of Members] else 0 END) AS [Age 65],   
  SUM(case when [Age ID] = 'Age 85+' THEN [Number of Members] else 0 END) AS [Age 85+]
FROM dbo.finalResult_001
GROUP BY [Quote ID], [Deductible Plan]
;