Logical Database Design A primary key is which of the following? A derived attribute Any attribute An attribute that uniquely identifies each row An attribute that uniquely identifies each column A derived attribute Any attribute An attribute that uniquely identifies each row An attribute that uniquely identifies each column ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design Relations are: five-dimensional tables. four-dimensional tables. two-dimensional tables. three-dimensional tables. five-dimensional tables. four-dimensional tables. two-dimensional tables. three-dimensional tables. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design Normalization is a formal process for deciding which attributes should be grouped together in a relation. False True False True ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design The primary key in a relation does not need to be underlined. False True False True ANSWER DOWNLOAD EXAMIANS APP
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. There is no link between the supertype/subtype entities. The subtype primary key is assigned to each supertype. The supertype primary key is assigned to each subtype. There is no primary key/foreign key relationship between a supertype/subtype. There is no link between the supertype/subtype entities. The subtype primary key is assigned to each supertype. The supertype primary key is assigned to each subtype. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design The primary key of the new relation in a many-to-many relationship is a composite key comprised of the primary keys of each of the binary entities. True False True False ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS