Question

这是我的表格定义：

Ticket 
 -------------------------------
|ID        int              PK  |
|Paid      varchar(50)          |
 -------------------------------

TicketRow
 ----------------------------------
|ID            int              PK |
|TicketID_FK   int                 |
|SHtimeID_FK   int                 |
 ----------------------------------

这是我的SQL查询：

select SHtimeID_FK,count(*) as cnt 
from dbo.TicketRow as tr inner join dbo.Ticket as t on tr.TicketID_FK=t.ID
where t.Paid='ok'
group by SHtimeID_FK
having count(*)>1

我应该如何将此查询转换为Linq查询？

更新：

我尝试此查询，但我不知道应该如何完成查询！

MelliConcertEntities db = new MelliConcertEntities();
var s = (from x in db.TicketRow
                         where x.Ticket.Paid == "ok"
                         select x).GroupBy(???);

Answer 1

db.TicketRow
    .Where( tr => tr.Ticket.Paid == "ok" )
    .GroupBy( tr => tr.SHtimeID_FK )
    .Where( g => g.Count() > 1 )
    .Select( g => 
        new { 
            SHtimeID_FK = g.Key, 
            cnt = g.Count() } );

或

var s = from tr in db.TicketRow
        where tr.Ticket.Paid == "ok"
        group tr by tr.SHtimeID_FK into g
        where g.Count() > 1
        select new {
            SHtimeID_FK = g.Key,
            cnt = g.Count()
        };

通过sql查询将组转换为linq查询

1 个答案: