如何将Subquery Sql转换为lambda表达式？ [英] How Can I convert Subquery Sql to lambda expression?

问题描述

你好

我有这个sql命令你可以帮帮我怎么用lambda表达式写这个？



选择A. *

来自Tablename一个内连接（选择地址，状态

来自Tablename

group by address，state

have count（*）> 1）B

on A.address = B.address和A.state = B.state



谢谢为您提供帮助

Hello
I have this sql command Could you help me How can I write this with lambda expression?

Select A.*
from Tablename A inner join (select address,state
from Tablename
group by address,state
having count(*)>1) B
on A.address=B.address and A.state=B.state

Thank for your help

推荐答案

试试这个：

Try this:

var qry = TableA.AsEnumerable()
         .GroupBy(a=>new{a.address, a.state})
         .Where(grp.Count()>1)
         .Select(d=>new{address=d.Key.address, state=d.Key.state});

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