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Data Engineering by Brian Shive

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Chapter 5

Data Model Components

The next day I started in with Luke to define some of the major components of data models. The first major topic for Luke was uniqueness.I had the opportunity to work briefly with Ted Codd at IBM in the late 1970s. I thought it would be good to get in some name dropping to increase my “cool factor” with Luke. Unfortunately he had never heard of Ted and therefore was unimpressed with my brief but educational encounter with the founder of my discipline. Ted Codd, the inventor of relational data modeling and the SQL programming language, said that uniqueness was one of the most important issues in data modeling. ...

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