A one-to-one unary relationship _____.
A) involves a single entity type
B) involves two entity types
C) allows an occurrence of one entity type to be associated with several occurrences of another entity type
D) allows an occurrence of one entity type to be associated with several occurrences of another entity type and vice versa
E) allows an occurrence of one entity type to be associated with several occurrences of the same entity type

Question

Quizplus · Accepted Answer

A one-to-one unary relationship involves a single entity type, where one occurrence of the entity type is related to only one other occurrence of the same entity type.

A One-To-One Unary Relationship _____