Relationships between supertypes and subtypes are called IS-A relationships.
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Q44: Data modelers agree that weak,non-ID-dependent entities exist
Q45: The supremetype entity contains the attributes that
Q46: Entities with an IS-A relationship should have
Q47: Which of the following is not a
Q48: Which of the following is not a
Q50: ID-dependent entities are a common type of
Q51: Relationships among instances of a single entity
Q52: An attribute that determines which subtype is
Q53: One example of a database design using
Q54: Entities containing multivalued attributes are often represented
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