January 2005
Intermediate to advanced
384 pages
9h 7m
English
Content preview from Designing Effective Database SystemsBecome 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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Chapter 3. Relationships
Chapter 2 explored the design of the database structure, the process of analyzing the entities in the problem space and developing a set of relations that capture all the relevant data efficiently and effectively. But the relations are only one part of the data model. The associations between relations and the constraints on those associations are just as important. In this chapter, we’ll look at modeling relationships, the representation of associations in the relational model. As with defining relations, the basic principles are straightforward once you understand the semantics of the data model. Certain special cases don’t fit neatly into the model of relationships, however, and we’ll look at some of these later.
Terminology ...
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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.