January 2003
Intermediate to advanced
896 pages
19h 58m
English
book
Microsoft® .NET Compact Framework (Core Reference)
by Andy Wigley, Stephen Wheelwright, Robert Burbidge, Rory MacLoed, Mark Sutton
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Using Multitable DataSet Objects
Few practical applications have just one data table, and often the data in multiple tables is related in some way. The following sections look at the support for relations between multiple tables in ADO.NET using the .NET Compact Framework.
Defining Relations in a Multitable DataSet Object
You can express the data requirements for the packing check list sample application as follows:
"I have more than one suitcase."
"A suitcase can contain one or more items."
"An item cannot be in more than one suitcase at any one time!"
The preceding requirements suggest a one-to-many parent-child relationship between the tables MyBags and PackedItems. This relationship can be expressed in database modeling terms as:
"MyBags contains ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.