Logical Database Design When mapping a supertype/subtype relationship which of the following is true? There is no primary key/foreign key relationship between a supertype/subtype. The supertype primary key is assigned to each subtype. The subtype primary key is assigned to each supertype. There is no link between the supertype/subtype entities. There is no primary key/foreign key relationship between a supertype/subtype. The supertype primary key is assigned to each subtype. The subtype primary key is assigned to each supertype. There is no link between the supertype/subtype entities. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form? Fourth normal form First normal form Second normal form Third normal form Fourth normal form First normal form Second normal form Third normal form ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design Weak entities do not get mapped into a relation. False True False True ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design The entity integrity rule states that: no primary key may be unique. no primary key may be equal to a value in a foreign key. no primary key attribute may be null. no primary key can be composite. no primary key may be unique. no primary key may be equal to a value in a foreign key. no primary key attribute may be null. no primary key can be composite. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A foreign key may be null and still adhere to the referential integrity constraint. True False True False ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design An enterprise key is a primary key whose value is unique for a given relation. True False True False ANSWER DOWNLOAD EXAMIANS APP
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