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Join multiple columns from the same table using Linq

I would like to convert following sql query into Linq to SQL
select distinct r.CompanyLogo, j.JobName, j.JobId, ur.UserId, r.JobSeekerID
, ur.FirstName, j.JobType, j.JobCareerLevel, j.JobLocation
from UserInterest m
join job j on m.FunctionalId = j.FunctionId or m.Careerlevel = j.CarrerLevelId or m.SalId = j.SalaryRangeId
join UserRegistration ur on j.UserId = ur.UserId
join EmplrRegistration r on j.UserId = r.JobSeekerID
where m.Status = 1 and m.UserId = 1
going through this I have so far tried following which didn't work out
var list = (from m in entities.UserInterests
from j in entities.Jobs
where m.FunctionalId == j.FunctionId || m.SalId == j.SalaryRangeId || m.Careerlevel == j.CarrerLevelId
&& m.Status == true && m.UserId == 1
join ur in entities.UserRegistrations on m.UserId equals ur.UserId
join r in entities.EmplrRegistrations on m.UserId equals r.JobSeekerID
select new { r.CompanyLogo, j.JobName, j.JobId, ur.UserId, r.JobSeekerID
, ur.FirstName, j.JobType, j.JobCareerLevel, j.JobLocation }).Distinct().ToList();
Edit:
following query is being generated against Svyatoslav Danyliv answer which is returning 7 rows instead of 6
SELECT 1 AS [C1], [Extent4].[CompanyLogo] AS [CompanyLogo], [Extent2].[JobName] AS [JobName]
,[Extent2].[JobId] AS [JobId], [Extent3].[UserId] AS [UserId]
,[Extent4].[JobSeekerID] AS [JobSeekerID], [Extent3].[FirstName] AS [FirstName]
,[Extent2].[JobType] AS [JobType], [Extent2].[JobCareerLevel] AS [JobCareerLevel]
,[Extent2].[JobLocation] AS [JobLocation]
FROM [dbo].[UserInterest] AS [Extent1]
INNER JOIN [dbo].[Job] AS [Extent2] ON ([Extent1].[FunctionalId] = [Extent2].[FunctionId])
OR (([Extent1].[FunctionalId] IS NULL) AND ([Extent2].[FunctionId] IS NULL))
OR ([Extent1].[Careerlevel] = [Extent2].[CarrerLevelId])
OR (([Extent1].[Careerlevel] IS NULL) AND ([Extent2].[CarrerLevelId] IS NULL))
OR ([Extent1].[SalId] = [Extent2].[SalaryRangeId])
OR (([Extent1].[SalId] IS NULL)
AND ([Extent2].[SalaryRangeId] IS NULL))
INNER JOIN [dbo].[UserRegistration] AS [Extent3] ON [Extent2].[UserId] = [Extent3].[UserId]
INNER JOIN [dbo].[EmplrRegistration] AS [Extent4] ON [Extent2].[UserId] = [Extent4].[JobSeekerID]
WHERE (1 = [Extent1].[Status]) AND (1 = [Extent1].[UserId])

Join which contains not just AND expressions is possible via from x in entities.Where(x => ..). You have did that partially and made mistake in where condition.
Corrected query, looks the same as original SQL
var query =
from m in entities.UserInterests
from j in entities.Jobs.Where(j =>
m.FunctionalId != null && m.FunctionalId == j.FunctionId ||
m.Careerlevel != null && m.Careerlevel == j.CarrerLevelId ||
m.SalId != null && m.SalId == j.SalaryRangeId)
join ur in entities.UserRegistrations on j.UserId equals ur.UserId
join r in entities.EmplrRegistrations on j.UserId equals r.JobSeekerID
where m.Status == true && m.UserId == 1
select new { r.CompanyLogo, j.JobName, j.JobId, ur.UserId, r.JobSeekerID
, ur.FirstName, j.JobType, j.JobCareerLevel, j.JobLocation };
var list = query.Distinct().ToList();

Conditional retrieval of data through linq in C#

var Getdetails = (from p in XYZDb.tblPulls
join
ro in XYZDb.tblRentalOrders
on p.AffCode equals ro.AffCode.Value
join
tpsb in XYZDb.tblPullSheetBatchProcessings
on p.PullNo.ToString() equals tpsb.PullSheet
select new
{
PullNos = p.PullNo,
AffCode = p.AffCode,
TotalItems = p.TotalItems,
p.PostedOn,
p.UpdatedOn,
p.IsPrinted,
BatchName = tpsb.BatchName
})
.Where(i => i.PostedOn >= from_date && i.PostedOn <= to && i.IsPrinted != null).Distinct();
In the above code only the pullno having BatchName are coming, i want to retrieve all the pullno within that timezone, and if it is batched, then the BatchName will also appear. I am stuck on that. Any kind of help will be appreciated. Feel free to ask any question.

Use left outer join,
var Getdetails = (from p in XYZDb.tblPulls
join
ro in XYZDb.tblRentalOrders
on p.AffCode equals ro.AffCode.Value
join
tpsb in XYZDb.tblPullSheetBatchProcessings
on p.PullNo.ToString() equals tpsb.PullSheet into pt
from batch in pt.DefaultIfEmpty()
select new
{
PullNos = p.PullNo,
AffCode = p.AffCode,
TotalItems = p.TotalItems,
p.PostedOn,
p.UpdatedOn,
p.IsPrinted,
BatchName = (batch == null ? String.Empty : batch.BatchName )
})
.Where(i => i.PostedOn >= from_date && i.PostedOn <= to && i.IsPrinted != null).Distinct();

LINQ JOIN and OUTER JOIN - How to turn SQL into LINQ expression

I would like to turn the following SQL query into a LINQ expression (using Entity Framework 6.1). Thus far I have been unable find an acceptable LINQ expression that produces similar results. Any help turning this simple SQL statement into a LINQ express would be appreciated.
SELECT AAG.Id AS GroupId,
A.Id AS ActivityId,
A.Title As Title,
CASE WHEN AA.CompletedOn IS NULL THEN CAST(1 AS bit) ELSE CAST(0 AS bit) END AS Completed,
COALESCE(AAG.PointValue, 0) + SUM(COALESCE(AQ.PointValue, 0)) AS PointTotal
FROM ActivityAssignmentGroup AAG
INNER JOIN ActivityAssignment AA ON AA.GroupId = AAG.Id
INNER JOIN Activity A ON AA.ActivityId = A.Id
LEFT OUTER JOIN ActivityQuestion AQ ON AQ.ActivityId = A.Id
WHERE AAG.AssignedToId = 6
GROUP BY AAG.Id, A.Id, A.Title, CASE WHEN AA.CompletedOn IS NULL THEN CAST(1 AS bit) ELSE CAST(0 AS bit) END, COALESCE(AAG.PointValue,0)
Without the LEFT OUTER JOIN portion, the below LINQ statement is partially complete, but I cannot figure out the appropriate syntax to add the LEFT OUTER JOIN condition:
var assignments = await (from g in db.AssignmentGroups.AsNoTracking().Where(x => x.AssignedToId == studentTask.Result.PersonId)
join aa in db.ActivityAssignments.AsNoTracking() on g.Id equals aa.GroupId
join a in db.Activities.AsNoTracking() on aa.ActivityId equals a.Id
select new ActivityListViewModel
{
Id = a.Id,
Points = g.PointValue ?? 0,
Title = a.Title,
GroupId = g.Id,
Complete = (aa.CompletedOn != null)
});
Edit:
Thanks for the response Bob. I attempted to use the DefaultIfEmpty and looked at the resultant SQL query generated by the Entity Framework, but it didn't work. Prior to making this post, this is the LINQ statement I attempted:
var assignments = from g in db.AssignmentGroups.AsNoTracking().Where(x => x.AssignedToId == studentTask.Result.PersonId)
join aa in db.ActivityAssignments.AsNoTracking() on g.Id equals aa.GroupId
join a in db.Activities.AsNoTracking() on aa.ActivityId equals a.Id
from aq in db.ActivityQuestions.Where(q => q.ActivityId == a.Id).DefaultIfEmpty()
group aq by new { ActivityId = aq.ActivityId, Title = a.Title, GroupId = g.Id, Points = g.PointValue ?? 0, Completed = (aa.CompletedOn != null) } into s
select new ActivityListViewModel
{
Id = s.Key.ActivityId,
Points = s.Key.Points + s.Sum(y => y.PointValue ?? 0), //g.PointValue ?? 0,
Title = s.Key.Title,
GroupId = s.Key.GroupId,
Complete = s.Key.Completed
};
Of course, it didn't work either. The result was items missing the Id (ActivityId).

You need DefaultIfEmpty() to convert a join to left outer join, documentition from MSDN here
var assignments = await (from g in db.AssignmentGroups.AsNoTracking().Where(x => x.AssignedToId == studentTask.Result.PersonId)
join aa in db.ActivityAssignments.AsNoTracking() on g.Id equals aa.GroupId
join a1 in db.Activities.AsNoTracking() on aa.ActivityId equals a1.Id into a2
from a in a2.DefaultIfEmpty()
select new ActivityListViewModel
{
Id = a == null ? null : a.Id,
Points = g.PointValue ?? 0,
Title = a == null ? null : a.Title,
GroupId = g.Id,
Complete = (aa.CompletedOn != null)
});

Just to close the loop (and thank you Bob Vale)... the query below works:
var assignments = from g in db.AssignmentGroups.AsNoTracking().Where(x => x.AssignedToId == studentTask.Result.PersonId)
join aa in db.ActivityAssignments.AsNoTracking() on g.Id equals aa.GroupId
join a in db.Activities.AsNoTracking() on aa.ActivityId equals a.Id
from aq in db.ActivityQuestions.Where(q => q.ActivityId == a.Id).DefaultIfEmpty()
group aq by new { ActivityId = a.Id, Title = a.Title, GroupId = g.Id, Points = g.PointValue ?? 0, Completed = (aa.CompletedOn != null) } into s
select new ActivityListViewModel
{
Id = s.Key.ActivityId,
Points = s.Key.Points + s.Sum(y => y.PointValue ?? 0), //g.PointValue ?? 0,
Title = s.Key.Title,
GroupId = s.Key.GroupId,
Complete = s.Key.Completed
};
The issue was the group by condition and using ag.ActivityId when I should have used a.Id.

How can i use a where clause within a select statement in linq. (ie. on a property.)

I have this linq query:
var sku = (from a in con.MagentoStockBalances
join b in con.MFGParts on a.SKU equals b.mfgPartKey
join c in con.DCInventory_Currents on b.mfgPartKey equals c.mfgPartKey
where a.SKU != 0 && c.dcKey ==6
select new
{
Part_Number = b.mfgPartNumber,
Stock = a.stockBalance,
Recomended = a.RecomendedStock,
Cato = c.totalOnHandQuantity
}).ToList();
Now i need to remove the c.dcKey ==6 condition and have something like this:
var sku = (from a in con.MagentoStockBalances
join b in con.MFGParts on a.SKU equals b.mfgPartKey
join c in con.DCInventory_Currents on b.mfgPartKey equals c.mfgPartKey
where a.SKU != 0
select new
{
Part_Number = b.mfgPartNumber,
Stock = a.stockBalance,
Recomended = a.RecomendedStock,
Cato = c.totalOnHandQuantity where c.dcKey == 6,
Kerry = c.totalOnHandQuantity where c.dcKey == 7
}).ToList();

Something like this:
Cato = c.dcKey == 6 ? c.totalOnHandQuantity : 0,
Kerry = c.dcKey == 7 ? c.totalOnHandQuantity : 0
The ?: syntax is called a conditional operator.

Instead of adding another join, I would use a separate query in a let:
from a in con.MagentoStockBalances
join b in con.MFGParts on a.SKU equals b.mfgPartKey
where a.SKU != 0
let cs = con.DCInventory_Currents.Where(c => b.mfgPartKey == c.mfgPartKey)
select new
{
Part_Number = b.mfgPartNumber,
Stock = a.stockBalance,
Recomended = a.RecomendedStock,
Cato = cs.Single(c => c.dcKey == 6).totalOnHandQuantity
Kerry = cs.Single(c => c.dcKey == 7).totalOnHandQuantity
}
Though I have no idea how well will LINQ to SQL handle a query like this (if it handles it at all).

var query= from x in context.a
where String.IsNullOrEmpty(param1) || (x.p == param1 && x.i == param2)
select x;

Getting Total Record by Group by in Linq

I have one query in SQL, want to convert it to Linq. My Query is :
select count(tbs.tbsid) as CNTSeats,tbm.BusNo
from tdp_tourpackageschedule tps
join tdp_tourpackage tp on tp.TourID = tps.FK_TourID
join tdp_tourbusseats tbs on tbs.tbsid = tps.fk_tbsid
join tdp_tourbusmaster tbm on tbm.tbid = tbs.fk_tbid
where fk_tdid = #FKTDID and fk_TourID = #FKTourID and IsOpen = 1
group by tbm.BusNo
I tried this Code:
var tourAvail = (from ts in entities.tdp_TourPackageSchedule
join tp in entities.tdp_TourPackage on ts.FK_TourID equals tp.TourID
join tbs in entities.tdp_TourBusSeats on ts.FK_TBSID equals tbs.TBSID
join tb in entities.tdp_TourBusMaster on tbs.FK_TBID equals tb.TBID
where ts.FK_TDID == TDID && ts.FK_TourID == TourID && ts.IsOpen == 1
group tb by tb.BusNo into cnt
select new
{
//BusNo = cnt.bu
//Count = cnt.Select(x => x.tdp_TourBusSeats).Distinct().Count()
});
I don't know how to get count of records, anyone can help ?

Do :
var tourAvail = (from ts in entities.tdp_TourPackageSchedule
join tp in entities.tdp_TourPackage on ts.FK_TourID equals tp.TourID
join tbs in entities.tdp_TourBusSeats on ts.FK_TBSID equals tbs.TBSID
join tb in entities.tdp_TourBusMaster on tbs.FK_TBID equals tb.TBID
where ts.FK_TDID == TDID && ts.FK_TourID == TourID && ts.IsOpen == 1
group tb by tb.BusNo into cnt
select new
{
BusNo = cnt.Key,
Count = cnt.Count()
}).ToList();