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The Relational Data Model

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.

table in the memory of a computer. The right structure can enhance efficiency for many operations (Section 8.4). Secondary indexes provide additional structure and help perform other opera-tions efficiently (Sections 8.5 and 8.6). Our third theme is a very …

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