May 2002
Beginner
408 pages
9h 10m
English
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Using a Timestamp for Optimistic Concurrency
If you are using a data source (table) on a DBMS such as Microsoft SQL Server 2000 that allows for a timestamp column to be defined in a table, the coding for optimistic concurrency can be made much simpler. You must remember, though, that the code you write for DBMS-specific nuances (like that of timestamp) must only be used with that DBMS.
The timestamp column, if present in a table, will be updated automatically each time the data row is changed. This provides a single table column that can be used for comparison in the UPDATE statement rather than having to compare all the data columns. However, you must first have a timestamp column in the table that you are using.
Listing 14.2 is the Customers ...
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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.
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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.