SQL利用Case When Then多条件判断SQL 语句

Select top 100 State,JoinState,

(case when State=1 and Joinstate=0 then 2 when State=1 and JoinState=1 then 1 else 0 end)

as usestate from UserInfo

(2)

select      ID,Username,namer=(case when(score<='50')    then '实习'

when(score>'50'  and  score<='500' )   then '赤脚医生'

when(score>'500'  and score<='1000' )   then '村卫生员'

when(score>'1000'  and score<='1500' )   then '乡卫生员'

when(score>'1500'  and score<='2000' )   then '镇卫生员'

when(score>'2000'  and score<='3000' )   then '医师'

when(score>'3000'  and score<='5000' )   then '主治医师'

when(score>'5000'  and score<='10000' )   then '副主任医师'

when(score>'10000'  and score<='20000' )   then '主任医师'

when(score>'20000'  and score<='50000' )   then '健康大使'

else   '健康大使'  end ), (SELECT count(id)

FROM  jk01_YiWen_Question

WHERE  UserID =  dbo.jk01_Member.ID)  as  questionnum

from  jk01_Member