Question

LinQ INNER JOIN AND LEFT JOIN in same query ... How To?

Asked by: remi_106

I would like to know how to convert this SQL Query into a LinQ equivalent:

SELECT nContractDeliverables.* FROM (nContractDeliverables  INNER(Join) nContractPaymentLines ON (nContractDeliverables.DeliverableNo = nContractPaymentLines.DeliverableNo) AND  (nContractDeliverables.[MR No] = nContractPaymentLines.[Mr No]))  LEFT JOIN  nFacilityDeliverables ON (nContractDeliverables.DeliverableNo = nFacilityDeliverables.DeliverableNo) AND  (nContractDeliverables.[MR No] = nFacilityDeliverables.[MR No])  WHERE (((nFacilityDeliverables.Facility) Is Null)) and nContractDeliverables.[mr no] = " & ntq(ContractNo) & " and not nz(AdditionalWorkFlag)  Order by nContractDeliverables.[Mr no], nContractDeliverables.DeliverableNo;")


I know to do standard Joins ... but this one baffles me ...

This is what I've written so far, but I'm not sure if it is correct ...

Dim rsContractDeliverables = From cd In dc2.nContractDeliverables Join _
fd In dc.nFacilityDeliverables On cd.DeliverableNo Equals fd.DeliverableNo And _
fd.MR_No Equals cd.MR_No Group Join _
pl In dc3.nContractPaymentLines On cd.DeliverableNo Equals pl.DeliverableNo And _
cd.MR_No Equals pl.Mr_No Into Group Where _
((fd.Facility Is Nothing) And cd.MR_No = ntq(pContractNumber) And cd.AdditionalWorkFlag <> Nothing) Order By _
cd.MR_No, cd.DeliverableNo

I'm basing the above work on an article where "Group Join" seems to be used to translate LEFT JOINS.
See: http://news.speeple.com/msdn.com/2007/12/31/converting-sql-to-linq-part-6-joins-bill-horst.htm

PS: Disregard ntq functions ...

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Asked On
2008-01-22 at 19:51:06ID23103370
Tags

ASP.NET, LinQ

,

Internet Explorer

Topics

Language Integrated Query - LINQ

,

.Net Editors & IDEs

,

Microsoft Visual Basic.Net

Participating Experts
1
Points
500
Comments
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Answers

 

by: jdraggiPosted on 2008-02-24 at 20:51:50ID: 20972996

 

by: remi_106Posted on 2008-02-24 at 20:56:11ID: 20973015

Well you were the only one to reply. The article is a'ight. Thank's for your time :)

20120131-EE-VQP-002

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