Explain why an index is only effective when an attribute's values cover a suitable range of values. This is the sole situation in which an index is helpful.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Explain why an index is only effective when an attribute's values
cover a suitable range of values. This is the sole situation in which
an index is helpful.
Transcribed Image Text:Explain why an index is only effective when an attribute's values cover a suitable range of values. This is the sole situation in which an index is helpful.
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