Logical Database Design A null value is assigned when no other value applies. True False True False ANSWER DOWNLOAD EXAMIANS APP
Logical Database Design A foreign key is which of the following? 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 An attribute that serves no purpose The same thing as a primary key 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 A transitive dependency is which of the following? A functional dependency between two or more nonkey attributes. A functional dependency between two or more key attributes. A relation that is in second normal form. A relation that is in first normal form. A functional dependency between two or more nonkey attributes. A functional dependency between two or more key attributes. A relation that is in second normal form. A relation that is in first normal form. 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 The entity integrity rule states that: no primary key can be composite. no primary key may be unique. no primary key may be equal to a value in a foreign key. no primary key attribute may be null. no primary key can be composite. no primary key may be unique. no primary key may be equal to a value in a foreign key. no primary key attribute may be null. ANSWER DOWNLOAD EXAMIANS APP
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