Question

我想创建一个＆＃34;计算＆＃34;列基于＆＃34; if ... else＆＃34;逻辑。我试过了：

        x.ApplicationID
        ,CASE WHEN DATEDIFF(dd,  x.CreateDate, GETDATE()) < 7 THEN 1
            WHEN DATEDIFF(dd,  x.CreateDate, GETDATE()) < 14 THEN 2
            WHEN DATEDIFF(dd,  x.CreateDate, GETDATE()) < 30 THEN 3
            ELSE 0
        END AS Prodleni

引发错误：

关键字＆＃39; WHEN＆＃39;附近的语法不正确。

帮助将不胜感激。

Answer 1

只需要其他1个。你需要使用如下 -

 x.ApplicationID
        ,CASE WHEN DATEDIFF(dd,  x.CreateDate, GETDATE()) < 7 THEN 1
               WHEN DATEDIFF(dd,  x.CreateDate, GETDATE()) < 14 THEN 2
               WHEN DATEDIFF(dd,  x.CreateDate, GETDATE()) < 30 THEN 3
            ELSE 0
        END AS Prodleni

了解更多信息 https://docs.microsoft.com/en-us/sql/t-sql/language-elements/case-transact-sql

如何正确执行CASE逻辑？

1 个答案: