June 2010
Intermediate to advanced
266 pages
5h 55m
English
Content preview from Patterns of Data ModelingBecome 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 16
Relational Database Design
This chapter summarizes my approach to database design. I start with a UML model of conceptual and logical intent and use that as the basis for preparing an IDEF1X model. Given an IDEF1X model, modern tools can readily generate SQL code to create the database structure. As a matter of software engineering discipline, I recommend a uniform policy for database design and deviate from the recommendations that follow only for good cause (such as demanding performance).
16.1 Mapping: Entity Types
As Figure 16.1 shows, each entity type normally maps to a table. Each attribute becomes a column in the table. There may be additional columns for existence-based identity, buried relationships, and generalization discriminators ...
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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.