A primary key of another entity as an attribute of an entity creates: A Parent-Child connection exists between the tables. B Many-to-many connection between the tables. C Network model connecting the tables. D A one-to-many relationship between the tables.

A primary key of another entity as an attribute of an entity creates: A Parent-Child connection exists between the tables. B Many-to-many connection between the tables. C Network model connecting the tables. D A one-to-many relationship between the tables.

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter1: Overview Of Database Concepts

Section: Chapter Questions

Problem 16MC

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Concept explainers

Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.

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