SQL DISTinc 的难题

[北极星6666]

Sql= "select DISTINCT (UserID),Content,Title,RootID,JoinTime from Dv_Boke_Post where Content is not null and stype=0 order by JoinTime Desc "

我只想让记录集中不要存在相同的UserID
可是我上面这样写,怎么还会影响到Content字段呢
因为Content是ntext类型
真是搞不懂啊

后来这样写报是不会报错,可记录集里面还是会有重复的UserID
Sql= "select (UserID),Content,Title,RootID,JoinTime from Dv_Boke_Post where Content is not null and stype=0 and [userid] in (select distinct [userid] from Dv_Boke_Post) order by JoinTime Desc "

请您快帮帮我啊

[若白师妹]

DISTINCT 会对你select 所有的栏位起效果

[银狐被占用]

select * from Dv_Boke_Post where id in(select min(id) from Dv_Boke_Post where Content is not null and stype=0 group by userid)

ID字段必须是唯一的。
如果没有该字段，那么换成字段里唯一值就可以了。