December 2002
Beginner to intermediate
432 pages
10h 10m
English
Content preview from ADO.NET Programming in Visual Basic™ .NET
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Concurrency Management
The second check box, Use Optimistic Concurrency, determines how the wizard will create the Insert and Update SQL statements. ADO .NET does not fully rely on SQL Server (or other database system) record locking to implement concurrency. For those who may not be used to working in multiuser environments, concurrency is the way a database system handles conflicts between users. For example, user A reads some data. User B reads the same data. What happens when users A and B make changes and try to update the data at the same time? The way a database system handles these situations is called concurrency management. Most systems use some combination of row locking and row versioning to manage concurrency. Row locking is the ...
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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.
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