Logical Database Design Relations are: four-dimensional tables. five-dimensional tables. two-dimensional tables. three-dimensional tables. four-dimensional tables. five-dimensional tables. two-dimensional tables. three-dimensional tables. 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 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. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A candidate key must uniquely identify each row. False True False True ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A primary key is which of the following? Any attribute An attribute that uniquely identifies each row A derived attribute An attribute that uniquely identifies each column Any attribute An attribute that uniquely identifies each row A derived attribute An attribute that uniquely identifies each column 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 When mapping a many-to-many unary relationship into a relation which of the following is true? Two relations are created. Three relations are created. One relation is created. Four relations are created. Two relations are created. Three relations are created. One relation is created. Four relations are created. ANSWER DOWNLOAD EXAMIANS APP
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