Logical Database Design A primary key is which of the following? An attribute that uniquely identifies each column Any attribute A derived attribute An attribute that uniquely identifies each row An attribute that uniquely identifies each column Any attribute A derived attribute An attribute that uniquely identifies each row ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design When mapping a binary many-to-many relationship into a relation which of the following is true? Four relations are created. Three relations are created. One relation is created. Two relations are created. Four relations are created. Three relations are created. One relation is created. Two relations are created. 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 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 If a relation is in third normal form, it does not need to be in second normal form. True False True False ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design Relations are: two-dimensional tables. three-dimensional tables. four-dimensional tables. five-dimensional tables. two-dimensional tables. three-dimensional tables. four-dimensional tables. five-dimensional tables. ANSWER DOWNLOAD EXAMIANS APP
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