在T-SQL select语句中使用CASE WHEN

Question

    SELECT Country, EmployeeName, Name As [FullName], OutPut1, OutPut2, OutPut3, 
    (OutPut1 + OutPut2 + OutPut3) AS Total,
    CASE WHEN Name IS NULL THEN '.........' 
         WHEN Name IS NOT NULL THEN '??????'
         END) 
         AS ParentID
 FROM CTE_Report;

上述声明中的情况正在解决以下错误。任何人都知道我错过了什么？

  

已定义公用表表达式但未使用..

Answer 1

已定义公用表表达式但未使用..

这意味着您创建CTE但不使用它， 与下面的快照相同的错误

Answer 2

SELECT Country, EmployeeName, Name As [FullName], OutPut1, OutPut2, OutPut3, 
(OutPut1 + OutPut2 + OutPut3) AS Total,
CASE WHEN Name IS NULL THEN '.........' 
     WHEN Name IS NOT NULL THEN '??????'
     END
     AS ParentID
 FROM CTE_Report;

它是一个括号问题。

Answer 3

试试这个

SELECT Country,
       EmployeeName,
       Name                            AS [FullName],
       OutPut1,
       OutPut2,
       OutPut3,
       ( OutPut1 + OutPut2 + OutPut3 ) AS Total,
       CASE
         WHEN Name IS NULL THEN '.........'
         ELSE '??????'
       END                             AS ParentID
FROM   CTE_Report;