On an entity-relationship diagram, the entity's identifier is:
A) identified by using a double-lined ellipse.
B) underlined on an E-R diagram.
C) bold on an E-R diagram.
D) written in all capital letters on an E-R diagram.
E) placed in italics.

Question

Quizplus · Accepted Answer

The entity's identifier is underlined on an E-R diagram. This is a convention to indicate the attribute(s) that function as the primary key for the entity.

On an Entity-Relationship Diagram, the Entity's Identifier Is