Logical Database Design The entity integrity rule states that: no primary key may be unique. no primary key attribute may be null. no primary key can be composite. no primary key may be equal to a value in a foreign key. no primary key may be unique. no primary key attribute may be null. no primary key can be composite. no primary key may be equal to a value in a foreign key. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A foreign key is which of the following? The same thing as a primary key An attribute that serves no purpose An attribute that serves as the primary key of another relation Any attribute The same thing as a primary key An attribute that serves no purpose An attribute that serves as the primary key of another relation Any attribute ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design Relations are: three-dimensional tables. five-dimensional tables. four-dimensional tables. two-dimensional tables. three-dimensional tables. five-dimensional tables. four-dimensional tables. two-dimensional tables. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A relation has which of the following properties? Attributes can have the same name within a given table. Each relation has a unique name. Each row is not unique. The order of the columns is significant. Attributes can have the same name within a given table. Each relation has a unique name. Each row is not unique. The order of the columns is significant. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design An enterprise key is a primary key whose value is unique for a given relation. False True False True 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? Third normal form Fourth normal form Second normal form First normal form Third normal form Fourth normal form Second normal form First normal form ANSWER DOWNLOAD EXAMIANS APP
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