Question

SELECT user 
FROM userlist zH with(nolock) 
where zH.user in (case when zh.trait='1' then ('B', 'HO', 'KO', 'PL','APP','2A','2B') else ('O') end)

这个声明可以用于案例工作吗？我希望你明白我的意思。感谢。

Answer 1

SELECT  [user]
FROM    userlist zH WITH ( NOLOCK )
WHERE   ( zh.trait = '1'
          AND zH.[user] IN ( 'B', 'HO', 'KO', 'PL', 'APP', '2A', '2B' )
        )
        OR ( zh.trait <> '1'
             AND zH.[user] IN ( 'O' )
           )

Answer 2

您可以使用嵌套的case语句，例如

SELECT user 
FROM userlist zH with(nolock) 
where 'true' = 
   (case when zh.trait = '1' 
       then 
           case when zH.user in ('B', 'HO', 'KO', 'PL','APP','2A','2B') 
               then 'true'
               else 'false'
           end
       else 
           case when zH.user = 'O'
               then 'true'
               else 'false'
           end
   end)

IN CASE的SQL语句

2 个答案: