Database Concepts (7th Edition)
Database Concepts (7th Edition)
7th Edition
ISBN: 9780133544626
Author: David M. Kroenke, David J. Auer
Publisher: PEARSON
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Chapter 4, Problem 4.11RQ

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Identifier:

Identifier is an attribute which is used to uniquely identify a particular entity instances from an entity.

Note: An entity instance is an occurrence of a particular entity.

Composite identifier:

Composite identifier is combinations of two or more attributes in an entity that can be uniquely identify each instance in the entity...

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