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Databases Illuminated, 4th Edition
book

Databases Illuminated, 4th Edition

by Catherine M. Ricardo, Susan D. Urban, Karen C. Davis
March 2022
Intermediate to advanced content levelIntermediate to advanced
682 pages
22h 58m
English
Jones & Bartlett Learning
Content preview from Databases Illuminated, 4th Edition

4.8 Mapping an Extended Entity-Relationship (EER) Model to a Relational Schema

The techniques discussed in Section 4.7 for mapping an ER model to a relational model apply to the EER model, but they must be extended to take into account the additional features of the EER model, namely specialization/generalization and union.

4.8.1 Summary of ER to Relational Mapping Concepts

For entity sets and relationships that are not part of generalizations or unions, the mapping proceeds as for the ER model.

  • Map strong entity sets to tables having a column for each single-valued, noncomposite attribute.

  • For composite attributes, create a column for each component and do not represent the composite. Alternatively, create a single column for the composite ...

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Publisher Resources

ISBN: 9781284231595