I am struggling with how to write the below equivalent as LINQ. Truly I guess I am only struggling with how I represent the INNER JOIN ()
portion. Is that called a Nested Join? Anonymous Join? I am not even sure. Anyway, big thanks to anyone who can point me true. Even if it is just what this is called so I can BING it properly.
SELECT p.PersonID, p.FirstName, p.MiddleName, p.LastName, cp.EnrollmentID, cp.EnrollmentDate, cp.DisenrollmentDate
FROM vwPersonInfo AS p
INNER JOIN (
SELECT c.ClientID, c.EnrollmentID, c.EnrollmentDate, c.DisenrollmentDate
FROM tblCMOEnrollment AS c
LEFT OUTER JOIN tblWorkerHistory AS wh
ON c.EnrollmentID = wh.EnrollmentID
INNER JOIN tblStaffExtended AS se
ON wh.Worker = se.StaffID
WHERE (wh.EndDate IS NULL OR wh.EndDate >= getdate())
AND wh.Worker = --WorkerID Param Here
) AS cp
ON p.PersonID = cp.ClientID
ORDER BY p.PersonID
just put the inner query in its own variable. (It will be translated into one single SQL expression)
var innerQuery = from x in db.tblCMOEnrollment
where ...
select ...;
var query = from a in vwPersonInfo
join b innerQuery on p.PersonID equals cp.ClientID
select ...;
I think you can do this by writing a second method and joining on that method:
private static IEnumerable<Table> GetData(int joinKey)
{
return (from x in context.TableB.Where(id => id.Key == joinKey select x).AsQueryable();
}
Then you can do your normal query:
var query = from c in context.TableA
join GetData(c.PrimaryKeyValue)
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