Logical Database Design A foreign key is which of the following? An attribute that serves as the primary key of another relation The same thing as a primary key Any attribute An attribute that serves no purpose An attribute that serves as the primary key of another relation The same thing as a primary key Any attribute An attribute that serves no purpose ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A primary key is which of the following? 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 An attribute that uniquely identifies each column ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A relation has which of the following properties? The order of the columns is significant. Each row is not unique. Each relation has a unique name. Attributes can have the same name within a given table. The order of the columns is significant. Each row is not unique. Each relation has a unique name. Attributes can have the same name within a given table. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design When mapping a multivalued attribute into a relation which of the following is true? Three relations are created. Four relations are created. One relation is created. Two relations are created. Three relations are created. Four relations are created. One relation is created. Two relations are created. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A synonym is two or more attributes that have different names but the same meaning. True False True False ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design The entity integrity rule states that: 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. no primary key may be unique. no primary key attribute may be null. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS