EXAMIANS
Action assertions have traditionally been implemented within an application program.
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It is appropriate to use a supertype/subtype relationship when there are attributes that apply to some of the instances of an entity type.
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When an entity instance must be a member of only one subtype, it is which of the following?
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Which of the following statements concerning business rules is true?
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An action assertion is a statement that expresses some aspect of the static structure of the organization.
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An ERD that has had the entities clustered will display more entities.
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Generalization is the process of defining more general entity types from a set of more specialized entity types.
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An entity instance of a subtype represents the same entity instance of a supertype.
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A supertype can only have only one subtype.
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Which one of the following symbols is not used in an ERD?
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