在Where子句中添加案例声明 [英] Add Case Statement in Where Clause

问题描述

我需要在where子句中添加case语句.我希望它根据TermDate的值运行下面的任何一条语句.

I need to add a case statement in a where clause. I want it to run either statement below depending on the value of TermDate.

Select * 
from myTable
where id = 12345
    AND TermDate CASE  
    WHEN NULL THEN
       AND getdate() BETWEEN StartDate AND DATEADD(dd, 30, StartDate)
    ELSE
    AND GETDATE < TermDate
    END

推荐答案

为什么不仅仅使用OR条件?

Why not just use an OR condition?

SELECT * 
FROM  myTable
WHEN  id = 12345
AND   ((TermDate IS NULL AND 
        getdate() BETWEEN StartDate AND DATEADD(dd, 30, StartDate)) OR
       GETDATE() < TermDate)

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