November 2004
Intermediate to advanced
1024 pages
27h 50m
English
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Transactions
You can group a set of statements to form a transaction. The transaction can be committed when all has gone well. Or, if an error has occurred in one of them, it can be rolled back as if none of the commands had been issued.
The major reason for grouping commands into transactions is database integrity. For example, suppose we want to transfer money from one bank account to another. Then, it is important that we simultaneously debit one account and credit another. If the system fails before crediting the other account, the debit needs to be undone.
If you group update statements to a transaction, then the transaction either succeeds in its entirety and it can be committed, or it fails somewhere in the middle. In that case, you can ...
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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.