如何从SQL Server 2014中的另一个和值中减去Sum值？

Question

我需要从条件“B”之后的字段之和中减去条件“A”之后的字段之和。

我尝试过不同的代码组合来尝试获取我正在寻找的东西。但我认为最简单，最愚蠢的代码是这样的：

SELECT A.AccountNumber
      ,SUM(
      (SELECT SUM(FinTransAmt) 
           FROM FinTransMaster
           WHERE FinTransCode IN ('Code01', 'Code02', 'Code03', 'Code04')
       )
    -      -- Minus sign
      (SELECT SUM(FinTransAmt) 
           FROM FinTransMaster
       WHERE FinTransCode IN ('Code05', 'Code06', 'Code07', 'Code08')
       ) 
      ) AS Interest

FROM FinTransMaster ft
   , Account a 

WHERE ft.AcctID=a.AccountId 
  AND a.AccountNumber = '101010101'
  AND CAST (ft.Created as date) >= '2017-06-01'
  AND CAST (ft.Created as date) <= '2017-07-01'

GROUP BY A.AccountNumber

Answer 1

也许另一种选择

SELECT A.AccountNumber
      ,Interest = IsNull(SUM( case when FinTransCode IN ('Code01', 'Code02', 'Code03', 'Code04')  then FinTransAmt end),0)
                - IsNull(SUM( case when FinTransCode IN ('Code05', 'Code06', 'Code07', 'Code08')  then FinTransAmt end),0)
FROM FinTransMaster ft
   , Account a 
WHERE ft.AcctID=a.AccountId 
  AND a.AccountNumber = '101010101'
  AND CAST (ft.Created as date) >= '2017-06-01'
  AND CAST (ft.Created as date) <= '2017-07-01'
GROUP BY A.AccountNumber

Answer 2

我认为你可以使用条件聚合来使用你的查询：

SELECT A.AccountNumber
    ,Sum(case when FinTransCode in ('Code05', 'Code06', 'Code07', 'Code08') then -FinTransAmt else FinTransAmt end) as Interest
FROM FinTransMaster ft
     Join Account a 
     On ft.AcctID=a.AccountId 
  AND a.AccountNumber = '101010101'
  AND CAST (ft.Created as date) >= '2017-06-01'
  AND CAST (ft.Created as date) <= '2017-07-01'
GROUP BY A.AccountNumber