While representing the relationship between two entities in an entity-relationship diagram, the N:N notation is used to indicate that the same number of entities are present on each end of the relationship.

Question

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The N:N notation in an entity-relationship diagram indicates a many-to-many relationship, where each entity in one set can be related to multiple entities in the other set, and vice versa.

While Representing the Relationship Between Two Entities in an Entity-Relationship