What does cardinality represent in the context of Entity-Relationship Diagrams (ERDs)?
- The data type of a primary key
- The number of instances of an entity that can be associated with another entity
- The primary key of an entity
- The uniqueness of entity attributes
In ERDs, cardinality represents the number of instances of an entity that can be associated with another entity. It defines how entities are related and the possible quantity of relationships, such as one-to-one, one-to-many, or many-to-many.
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