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The Relational Data Model - The Stanford University InfoLab

CHAPTER 8.. The Relational Data Model One of the most important applications for computers is storing and managing information. The manner in which information is organized can have a profound effect on how easy it is to access and manage. Perhaps the simplest but most versatile way to organize information is to store it in tables. The Relational Model is centered on this idea: the organization of data into collections of two-dimensional tables called relations. We can also think of the Relational Model as a generalization of the set data Model that we discussed in Chapter 7, extending binary relations to relations of arbitrary arity. Originally, the Relational data Model was developed for databases that is, Database information stored over a long period of time in a computer system and for database management systems, the software that allows people to store, access, and modify this information.

404 THE RELATIONAL DATA MODEL An important part of the design process is selecting “attributes,” or properties of the described objects, that can be kept together in a table, without introduc-

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