December 2001
Intermediate to advanced
800 pages
17h 55m
English
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Entity-Relationship Modeling
In 1976, Peter Chen published the first specification for viewing relational data as a collection of relationships between entities in “The Entity Relationship Model—Toward a Unified View of Data.” Chen's work (along with that of other theorists such as Hammer and McLeod, proponents of the Semantic Data Model) gave rise to E-R diagrams—pictorial depictions of entity relationships—now a mainstay of logical data modeling.
One of the first things you'll discover about E-R modeling is that there's no sequential path from business processes to fully defined logical data models. Constructing entity relationships requires a lot of thought. It's a process you'll probably go through repeatedly before you feel comfortable with ...
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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.