converting SQL join with group by and MAX to Linq - sql

Question

I have Created following query in sql but i am not able to find out how to implement StatusAndTrackingNotes table join in my linq:
SELECT *
FROM [Application] APP
join User USR on APP.ApplicationId = USR.UserApplicationId
join
(Select MAX(TrackingDate) as MaxDateTD,TrackingApplicationId
From StatusAndTrackingNotes
where TrackingLoanType = 1 and ((TrackingStatusCode <= 52 and TrackingStatusCode >= 50) or TrackingStatusCode = 62)
group by TrackingApplicationId) MTND on APP.ApplicationId = MTND.TrackingApplicationId
join Details DTL on APP.ApplicationId = DTL.ApplicationId
join ApplicationFees AF on APP.ApplicationId = AF.ApplicationId
where APP.LatestStatus = 'F' and DTL.Type = 1 and DTL.FundingDate >= '2011-06-01' and DTL.FundingDate <= '2013-06-30'
and AF.FirstRefPaidDate is not null
Kindly help me with the syntax.First i was using using simple query with joins and then
([Linq Query]).GroupBy(i => i.TrackingApplicationId).Select(g => g.OrderByDescending(c => c.TrackingDate).FirstOrDefault());
but it doesnt return any result. Kindly help.
Thanks in advance

Answer 1

I would solve it by creating StatusAndTrackingNotes as separate query and join and group it to the "main query". I.e:
var trackingQuery =
from t in statusAndTrackingNotes
where t.TrackingLoanType == 1 && (t.TrackingStatusCode <= 52 && t.TrackingStatusCode >=50) || t.TrackingStatusCode == 62
group t by t.TrackingApplicationId into trackings
select new
{
TrackingApplicationId = trackings.Key,
MaxDate = trackings.Max(t => t.TrackingDate)
};
var appQuery =
from app in Application
join t in trackingQuery on app.ApplicationId equals t.TrackingApplicationId
/* other joins here */
select new
{
app,
t.MaxDate,
};