Thursday, February 4, 2010

A physical representation of a database is called a data model...True or False?

Typically, for a given data base, there is a structural description of the type of facts held in that database: this description is known as a schema. The schema describes the objects that are represented in the database, and the relationships among them. There are a number of different ways of organizing a schema, that is, of modeling the database structure: these are known as database models (or data models). The model in most common use today is the relational model.

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