In a many-to-many unary relationship an occurrence of one entity type can be associated with many occurrences of another entity type while each occurrence of the second entity type can be associated with only one occurrence of the first.

Question

Quizplus · Accepted Answer

In a many-to-many unary relationship, an occurrence of the entity type can be associated with many occurrences of the same entity type, not another entity type, and it's reciprocal.

In a Many-To-Many Unary Relationship an Occurrence of One Entity