Computer Science / Unit 8 CS 0420 short lesson, about 20 seconds
The Relational Model
Captions available
The idea
The relational model, proposed by Edgar F. Codd of IBM Research in 1970, bases data on the relation — a set-theory concept — rows as tuples, column headers as attributes.
In practice
A half-century of dominant database practice descends from one research paper.
Where people slip
The mathematics came first; the tables are its costume.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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