March 2003
Beginner
672 pages
14h
English
book
Database Design for Mere Mortals™: A Hands-On Guide to Relational Database Design, Second Edition
by Michael J. Hernandez
Content preview from Database Design for Mere Mortals™: A Hands-On Guide to Relational Database Design, Second Edition
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Summary
We opened this chapter with a discussion of the three types of relationships that can exist between a particular pair of tables—one-to-one, one-to-many, and many-to-many. You now know that the one-to-many relationship is the most common type of dual-table relationship and that the many-to-many relationship gives rise to problems that must be resolved. You then learned about a self-referencing relationship, which is a type of relationship that occurs between the records within a given table. It is similar to a dual-table relationship in that it can be one-to-one, one-to-many, or many-to-many.
Next, we discussed how to identify the relationships that exist among the tables in a database. First you learned how to construct and use ...
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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.