Solved

VB.net Join/merge 3 datatables by joining first two columns

Posted on 2014-02-18
3
2,735 Views
Last Modified: 2014-02-19
Hi

What VB.net code would I use to join 3 datatables by doing an inner join on the first two
columns/fields? The first two fields are of course the same.
0
Comment
Question by:Murray Brown
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 11

Expert Comment

by:SAMIR BHOGAYTA
ID: 39869743
hi...
Try this examples

SELECT a.sales_id, d.bus_title, s.cat_id
FROM tbl_sales a
INNER JOIN tb_sales_category s ON a.sales_id = s.sales_id
INNER JOIN tbl_business      d ON a.bus_id   = d.bus_id
INNER JOIN tb_category       b ON s.cat_id   = b.cat_id

or

SELECT p.Name, v.Name
FROM Production.Product p
JOIN Purchasing.ProductVendor pv
ON p.ProductID = pv.ProductID
JOIN Purchasing.Vendor v
ON pv.VendorID = v.VendorID
WHERE ProductSubcategoryID = 15
ORDER BY v.Name
0
 
LVL 83

Accepted Solution

by:
CodeCruiser earned 500 total points
ID: 39870176
You would need to add these datatables into a dataset and then add DataRelations for these tables. Example below

http://www.codeproject.com/Articles/18304/Using-Data-Relation-with-Data-Table
0
 

Author Closing Comment

by:Murray Brown
ID: 39870292
Thanks very much
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Well, all of us have seen the multiple EXCEL.EXE's in task manager that won't die even if you call the .close, .dispose methods. Try this method to kill any excels in memory. You can copy the kill function to create a check function and replace the …
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …

687 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question