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Part I

The first part of the book focuses on designing a database—that is, on the process of decomposing data into multiple tables.

Chapter 1 examines the problems involved in using a flat database—a single table that holds all of an application’s data—and makes a case for using instead a relational-database design consisting of multiple tables. But because relational-database applications divide data into multiple tables, it is necessary to reconstitute that data in ways that are useful—that is, to piece data back together from their multiple tables. Hence, there is a need for query languages and programming, which are in many ways an integral part of designing a database.


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