如何在SQL Server 2014中满足条件时选择ABS（值）？

Question

• 如果账户为“预付”（PlanCode = P0100），那么余额为负数（例如，如果他们欠100美元，则为-100）。
• 如果账户为“PostPaid”（PlanCode = P0200），那么余额为正（例如;如果他们欠100美元则为100）
• 一些PrePaid账户欠钱，因此显示积极的平衡（例如; 50意味着我们欠他们50美元）
• 一些PostPaid账户也欠款（如他们多付）并显示负值（例如; -50意味着我们欠他们50美元）

我想生成一份报告，显示欠我们5美元或更多的所有帐户。

我的代码错了，但也许我的逻辑是正确的？

SELECT A.[AccountId]
      ,A.[AccountNumber]
      ,CASE WHEN P.PlanCode = 'P0100' THEN 'PrePaid'
        WHEN P.PlanCode = 'P0200' THEN 'PostPaid'
       END PlanType
      ,CASE WHEN P.PlanCode = 'P0100' THEN (Select ABS(CurrentBalance) FROM Account WHERE CurrentBalance < 0)
        WHEN P.PlanCode = 'P0200' THEN (Select [CurrentBalance] FROM Account WHERE CurrentBalance > 0)
       END [CurrentBalance]

FROM [GEB_DWH].[dbo].[Account] A
INNER JOIN AccountPlan P ON A.AccountId = P.AccountId

WHERE A.CurrentBalance >= 5

ORDER BY CurrentBalance DESC

编辑： 我也尝试过：

SELECT A.[AccountId]
      ,A.[AccountNumber]
      ,CASE WHEN P.PlanCode = 'P0100' THEN 'PrePaid'
        WHEN P.PlanCode = 'P0200' THEN 'PostPaid'
       END PlanType
      ,ABS([CurrentBalance])[CurrentBalance]
      --,CASE WHEN P.PlanCode = 'P0100' THEN (Select ABS(CurrentBalance) FROM Account WHERE CurrentBalance < 0)
        --WHEN P.PlanCode = 'P0200' THEN (Select [CurrentBalance] FROM Account WHERE CurrentBalance > 0)
      -- END [CurrentBalance]

FROM [GEB_DWH].[dbo].[Account] A
INNER JOIN AccountPlan P ON A.AccountId = P.AccountId

WHERE ((P.PlanCode = 'P0100' AND (A.CurrentBalance)  < 0) OR (P.PlanCode = 'P0200' AND (A.CurrentBalance)  > 0))
  AND A.CurrentBalance > 5

ORDER BY CurrentBalance DESC

Answer 1

如果我理解正确：

WHERE (A.PlanCode = P0100 AND A.CurrentBalance >= 5) OR
      (A.PlanCode = P0200 AND A.CurrentBalance <= -5)