What is the relationship between a type and its subtype in a type hierarchy? What is the

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What is the relationship between a type and its subtype in a type hierarchy? What is the constraint that is enforced on extents corresponding to types in the type hierarchy?

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Fundamentals Of Database Systems

ISBN: 9780133970777

7th Edition

Authors: Ramez Elmasri, Shamkant Navathe

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Question Posted: Nov 09, 2021 01:16 AM

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What is the relationship between a type and its subtype in a type hierarchy? What is the

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The type hierarchy is based on the notion of type equality A type is always a ...View the full answer

Fundamentals Of Database Systems

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