Question

我有以下Case表达式，可以产生正确的结果。当我添加“OR”条件时，结果会发生变化。

为什么结果随着“OR”的增加而改变？

我希望通过添加“OR”语句ID 1仍应为“未分配”

Or声明

--OR ( TABLEA.ROLE != 'RED' AND  CCP.STATUS = 'Active' 
  --AND  TO_CHAR(CCP.END_DATE,'MM/DD/YYYY') = '09/09/9000'

完整查询

SELECT
  CASE 
    WHEN MAX(CASE WHEN TABLEA.ROLE = 'RED'
                        AND TABLEA.ID IS NULL
                        AND CCP.STATUS = 'Active')
                        --OR (TABLEA.ROLE != 'RED' AND  CCP.STATUS = 'Active'
                              --AND TO_CHAR(CCP.END_DATE,'MM/DD/YYYY') = '09/09/9000')
                   THEN TABLEA.DT
              END
          ) KEEP (DENSE_RANK LAST ORDER BY TABLEA.HISTORYID DESC,
                  CASE WHEN TABLEA.ROLE = 'RED'
                       THEN TABLEA.DT
                  END ASC NULLS FIRST
                 ) OVER (PARTITION BY CCP.ID) IS NULL
      THEN 'Unassigned'
    --WHEN TABLEA.ROLE != 'RED' THEN 'Unassigned'
    WHEN TO_CHAR(CCP.END_DATE,'MM/DD/YYYY') != '09/09/9000'
         AND CCP.STATUS = 'Closed'
      THEN 'Closed'
    ELSE 'Assigned'
  END AS CURRENT_STATUS2
  FROM TABLEA

没有OR声明的结果：

 ID    CURRENT_STATUS2
 1       Unassigned

OR语句的结果：应该是未分配且未分配

 ID    CURRENT_STATUS2
 1       Assigned

Answer 1

记住订单（来自上面的评论）这个和那个或那个不同于（this和that）或（this）

查询应为：

CASE 
WHEN MAX(CASE WHEN (TABLEA.ROLE = 'RED' 
  AND TABLEA.ID IS NULL 
  AND CCP.STATUS = 'Active' )
  OR( HIST.ROLE != 'RED' AND  CCP.STATUS = 'Active' 
  AND TO_CHAR(CCP.END_DATE,'MM/DD/YYYY') = '01/01/3000' )

Answer 2

不容易阅读的代码。我想你只是几个方括号：

WHEN (TABLEA.ROLE = 'RED' 
AND TABLEA.ID IS NULL 
AND CCP.STATUS = 'Active')
OR ( TABLEA.ROLE != 'RED' AND  CCP.STATUS = 'Active' 
AND  TO_CHAR(CCP.END_DATE,'MM/DD/YYYY') = '09/09/9000')

具有OR条件的案例表达

2 个答案: