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Logical Database Design

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

True
False

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Logical Database Design
Relations are:

four-dimensional tables.
five-dimensional tables.
three-dimensional tables.
two-dimensional tables.

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

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

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Logical Database Design
The entity integrity rule states that:

no primary key may be unique.
no primary key can be composite.
no primary key may be equal to a value in a foreign key.
no primary key attribute may be null.

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Logical Database Design
A primary key may be null.

True
False

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Logical Database Design
Normalization is a formal process for deciding which attributes should be grouped together in a relation.

True
False

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