Logical Database Design A candidate key must uniquely identify each row. 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 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. There is no primary key/foreign key relationship between a supertype/subtype. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design Well-structured relations encourage anomalies of data. False True False True ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A foreign key is which of the following? 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 The same thing as a primary key An attribute that serves as the primary key of another relation Any attribute ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design When mapping a regular entity into a relation which of the following is true? Two relations are created. 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. ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design When mapping a ternary relationship with an associative entity into a relation which of the following is true? Three relations are created. Two relations are created. Four relations are created. One relation is created. Three relations are created. Two relations are created. Four relations are created. One relation is created. ANSWER DOWNLOAD EXAMIANS APP
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