在 SQL Server 2014 中满足条件时如何 Select ABS（值）？

Question

当账户为 'PrePaid'（PlanCode = P0100）时，所欠余额为负（例如，-100，如果他们欠 $100。
当账户为 'PostPaid'（PlanCode = P0200）时，欠款为正（例如，如果他们欠 $100，则为 100）
一些预付账户欠款，因此显示余额为正（例如；50 表示我们欠他们 50 美元）
一些 PostPaid 帐户也欠钱（因为他们多付了钱）并且余额显示为负数（例如；-50 表示我们欠他们 50 美元）

我想生成一份报告，显示所有欠我们 5 美元或更多的帐户。

我的代码是错误的，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

如果我理解正确的话：

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

在 SQL Server 2014 中满足条件时如何 Select ABS（值）？

How to Select ABS(Value) when a condition is being met in SQL Server 2014?

sql

sql-server

absolute-value