(Answered) Two properties of relationships between entities in an erd

Engineering

Two properties of relationships between entities in an ERD are introduced:

Cardinality: refers to the ratio of parent instances to child instances

Modality: refers to whether or not an instance of a child entity can exist without a related instance in the parent entity.

Discuss how we can determine the cardinality for a relationship including examples of different type of cardinality (1:1, 1:N, and M:N)

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Computer Engineering, Engineering

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