Logical Database Design A foreign key is which of the following? The same thing as a primary key An attribute that serves as the primary key of another relation Any attribute An attribute that serves no purpose The same thing as a primary key An attribute that serves as the primary key of another relation Any attribute An attribute that serves no purpose ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design The primary key in a relation does not need to be underlined. True False True False 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 A relation has which of the following properties? Each row is not unique. The order of the columns is significant. Each relation has a unique name. Attributes can have the same name within a given table. Each row is not unique. The order of the columns is significant. Each relation has a unique name. Attributes can have the same name within a given table. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design The entity integrity rule states that: no primary key attribute may be null. no primary key may be unique. no primary key can be composite. no primary key may be equal to a value in a foreign key. no primary key attribute may be null. no primary key may be unique. 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 may be null and still adhere to the referential integrity constraint. False True False True ANSWER DOWNLOAD EXAMIANS APP
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