November 2012
Beginner
320 pages
6h 42m
English
Content preview from Getting Started with Talend Open Studio for Data IntegrationBecome 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 and denormalizing data
Database normalization is the process whereby a database schema is designed to reduce data duplication and redundancy. If a database is not designed with normalization principles in mind, it can:
- Get overly large, due to duplicated data
- Make data maintenance difficult or give rise to data integrity issues if the same data values reside in multiple tables
While we are not directly concerned with database schema design in this chapter, our next two examples look at processing operations borne from the same principles as database normalization, so readers who aren't familiar with the concepts may wish to read some introductory material first. For a good primer on database normalization, go to http://en.wikipedia.org/wiki/Database_normalization ...
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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.