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Data Analysis for Database Design, 3rd Edition
book

Data Analysis for Database Design, 3rd Edition

by David Howe
May 2001
Intermediate to advanced content levelIntermediate to advanced
336 pages
14h 36m
English
Butterworth-Heinemann
Content preview from Data Analysis for Database Design, 3rd Edition
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A query optimiser needs to know the storage structures used for tables. Some of the
commonly used storage structures are outlined here. We assume that tables are stored
on direct access devices such as disk drives. The discussion refers to the Student table
shown in Fig. 18.1. As this sample table contains only a few rows and columns, it could
be held entirely in main memory and searched by a simple linear scan of the rows. It is
used here to illustrate techniques that are used to access the much larger tables likely to
be encountered in reality. It is worth bearing in mind, though, that one of the most
effective ways of improving ...
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Publisher Resources

ISBN: 9780750650861