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Platinum Edition Using XHTML™, XML, and Java™ 2 by Andrew H. Watt, Mike Morgan, Jim O'Donnell, Eric Ladd

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Relational Databases

Most relational database servers consist of a set of programs that manage large amounts of data, offering a rich set of query commands that help manage the power behind the database server. These programs control the storage, retrieval, and organization of the information within the database. This information can be changed, updated, or removed after the support programs or scripts are in place.

Unlike DBM databases, relational databases don't link records together physically like the DBM database does by using a key/value pair. Instead, they provide a field in which information can be matched, and the results can be sent back to the person performing the query, as if the database were organized that way.

Relational databases ...

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