Logical Database Design A synonym is two or more attributes that have different names but the same meaning. False True False True ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design The entity integrity rule states that: no primary key may be equal to a value in a foreign key. no primary key can be composite. no primary key attribute may be null. no primary key may be unique. no primary key may be equal to a value in a foreign key. no primary key can be composite. no primary key attribute may be null. no primary key may be unique. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design When mapping a supertype/subtype relationship which of the following is true? The supertype primary key is assigned to each subtype. There is no primary key/foreign key relationship between a supertype/subtype. The subtype primary key is assigned to each supertype. There is no link between the supertype/subtype entities. The supertype primary key is assigned to each subtype. There is no primary key/foreign key relationship between a supertype/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 When mapping a many-to-many unary relationship into a relation which of the following is true? Three relations are created. Two relations are created. One relation is created. Four relations are created. Three relations are created. Two relations are created. One relation is created. Four relations are created. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A foreign key is which of the following? An attribute that serves no purpose Any attribute An attribute that serves as the primary key of another relation The same thing as a primary key An attribute that serves no purpose Any attribute An attribute that serves as the primary key of another relation The same thing as a primary key ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design If no multivalued attributes exist in a relation, then the relation is in what normal form? Fourth normal form Second normal form First normal form Third normal form Fourth normal form Second normal form First normal form Third normal form ANSWER DOWNLOAD EXAMIANS APP
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