将SQL语句转换为LINQ VS2010

Posted 2021-04-02

我很感激帮助将以下sql语句转换为linq：

select *
from (
    select 
        *,
        rn = row_number() over (partition by ClientId order by VisitId)
    from
        Visit
) activityWithRn
inner join vw_MasterView on  vw_MasterView.VisitId = activityWithRn.VisitId
where activityWithRn.rn =3

当我使用Linqer（一个很棒的程序）时，我收到以下错误：

SQL cannot be converted to LINQ: Field [rn = row_number() over (partition by ClientId order by VisitId)] not found in the current Data Context.

提前致谢。

答案

除了使用row_number() over之外，我认为LINQ中Skip...Take没有任何相应的功能：

var q = (from v in Visit
            join mv in vw_MasterView on v.VisitId equals mv.VisitId 
            orderby v.VisitId
            select v).Skip(2).Take(1);