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ER Model and Business Rules

ER Model and Business Rules
A rectangle represents which of the following in an EER?

Relationship
Entity
Attribute
Optional One

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ER Model and Business Rules
Action assertions have traditionally been implemented within an application program.

False
True

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ER Model and Business Rules
An entity instance of a subtype represents the same entity instance of a supertype.

True
False

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ER Model and Business Rules
Overlapping and disjoint subtypes have different approaches on how the subtype discriminator is applied.

False
True

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ER Model and Business Rules
A supertype is an entity type that shares common attributes or relationships distinct from other subgroupings.

True
False

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ER Model and Business Rules
A subtype discriminator of the supertype is an attribute whose values determine the target subtype(s).

True
False

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