October 2002
Beginner
864 pages
18h 41m
English
Content preview from Sams Teach Yourself SQL in 21 Days, Fourth EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Normalizing a Database
Normalization is the process of reducing the repetition and redundancies of data in a database. Didn't we already say that? If we were to normalize the first sentence in this paragraph, it might read, “Normalization is the process of reducing redundant information in a database.”
The Raw Database
When you begin designing a database, or migrating a database from one implementation to another, you may find yourself staring at a massive collection of data. All of your data is there, but it is not in a manageable order. A database that is not normalized may contain data that resides in one or more different tables for no apparent reason. This could be bad for security reasons, disk space use, speed of queries, efficiency of ...
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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.