sql - 在Where子句中添加Case语句

Question

我需要在 where 子句中添加 case 语句。我希望它根据 TermDate 的值运行下面的任一语句。

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

Answer 1

为什么不直接使用 OR 条件？

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