A binary relationship that is one-to-many in an ERD is best represented by adding the primary key attribute (or attributes) of the entity on the one side of the relationship as .a O a foreign key in the relation that is on the many side of the relationship the creation of a separate relation; the primary key of this new relation is a composite key b O consisting of the primary key for each of the two entities in the relationship creating a relation with a composite primary key and nonkey attributes .c O adding the primary key attribute (or attributes) of the entity on the many side of the relationship .d O as a foreign key in the relation that is on the one side of the relationship
A binary relationship that is one-to-many in an ERD is best represented by adding the primary key attribute (or attributes) of the entity on the one side of the relationship as .a O a foreign key in the relation that is on the many side of the relationship the creation of a separate relation; the primary key of this new relation is a composite key b O consisting of the primary key for each of the two entities in the relationship creating a relation with a composite primary key and nonkey attributes .c O adding the primary key attribute (or attributes) of the entity on the many side of the relationship .d O as a foreign key in the relation that is on the one side of the relationship
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
Section: Chapter Questions
Problem 1PE
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