473,898 Members | 3,274 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

How to use DataRelation to perform in-memory joins?

How can I perform in-memory sql joins on dataset's, and have the result
in (perhaps) a DataTable?


Mar 28 '06 #1
1 1092
Buy ADO.NET. It's a MS Press book by David Sceppa. I have found it very

Or, go to the ADO.NET discussion forum at

I do not know the answer to your question off hand but I am sure you will
find it by barking up one of these 2 trees.
"Matthi" wrote:
How can I perform in-memory sql joins on dataset's, and have the result
in (perhaps) a DataTable?


Mar 28 '06 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

by: serge calderara | last post by:
Dear all, I have a dataset which contains 2 DataTable The idea is to bind a text box control with one table field and then diaplaye the associated content of the second table based on the first table entry. For that I have been guide to use data relation bettween those two table. The following code illustrate what I have done :
by: yaser | last post by:
Hello: I need save my update but i can't :confused: :confused: :confused: look my code : Imports System.Data Imports System.Data.OleDb Public Class Form1
by: Stefan | last post by:
I need help with the following problem. I created a datarelation DataRelation oRelation = new DataRelation("plz_relation",odsAdressenDS.v_plz.plz_idColumn, odsAdressenDS.v_poststelle.plz_idColumn); odsAdressenDS.Relations.Add(oRelation); I know want to add this relation to two comboboxes
by: Fox | last post by:
Is it possible to get back the DataRelation contect from a dataSet? { DataRelation myDataRelation; DataColumn parentColumn; DataColumn childColumn; parentColumn = myDataSet.Tables.Columns; childColumn = myDataSet.Tables.Columns; myDataRelation = new DataRelation("parent2Child", parentColumn, childColumn); myDataSet.Tables.ParentRelations.Add(myDataRelation);
by: lekhacnair | last post by:
Hello, I am stuck with my datagrid datarelation. My code looks like this: Dim Case_Details As New DataTable Case_Details = data1.Tables(0) Dim Validation_Details As New DataTable Validation_Details = data2.Tables(0)
by: Jonathan | last post by:
Hi, I have two table (Business and Contacts) for which I would like to create a DataRelation. The problem is that the Foreign key field cannot be null. So the code throws an exception when trying to create the DataRelation. My database does not have any records; business or contacts. How do I create a data relation when the data does not yet exist? Then what if I want to add a business record and don't have a contact? -- Many thanks
by: frank | last post by:
I have several tables that have a one to one relationship. I have DataRelation objects to define these relationships. I would like to bind the DataRelation to both a gridview and a formview so that I can use different fields from different tables in a single gridview and formview. In the examples I have seen the gridview and formview are always bound to TableAdaptor objects. Is it possible to bind a formview or a gridview to a...
by: Rich | last post by:
Hello, Following an example at http://www.vb-tips.com/dbpages.aspx?IA=DG (by Cor Lightert and Ken Tucker) on binding a dataRelation to a Datagridview for sqlClient, I was able to view rows in datagridview2 that corresponded to a selected row in datagridview1. Great article/example.
by: Aryan | last post by:
Hi, I want to use DataRelation object for setting up relationship between two different datatable, but i want to use multiple columns to set up relation between two tables. For example. DataRelation dRelationOrgInd = new DataRelation("OrgInd", ds.Tables.Columns, ds.Tables.Columns, true); dRelationOrgInd.Nested = true; ds.Relations.Add(dRelationOrgInd);
by: Tony Johansson | last post by:
Hello! I can't understand what is this table DataRelation used for. I mean as long as you have this DataTable I can't see any point in using this DataRelation. //Tony
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.