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Logical Database Design

Logical Database Design
An enterprise key is a primary key whose value is unique for a given relation.

True
False

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Logical Database Design
The relational model consists of:

data in the form of tables.
unorganized data.
operations using non-SQL languages.
data redundancy.

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Logical Database Design
A null value is assigned when no other value applies.

True
False

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Logical Database Design
A relation has which of the following properties?

Each row is not unique.
The order of the columns is significant.
Attributes can have the same name within a given table.
Each relation has a unique name.

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Logical Database Design
A foreign key may be null and still adhere to the referential integrity constraint.

False
True

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Logical Database Design
If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?

First normal form
Fourth normal form
Second normal form
Third normal form

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