A composite identifier is defined as a composite attribute that is an identifier.
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Q11: An identifier serves the same role for
Q12: Entities can be associated with one another
Q13: An entity class is described by the
Q14: A compound identifier is an identifier consisting
Q15: E-R modeling recognizes both relationship classes and
Q17: An identifier of an entity instance must
Q18: In E-R modeling,entities within an entity class
Q19: An entity instance is an occurrence of
Q20: Relationships of degree two are referred to
Q21: An ID-dependent entity is an entity whose
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