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Logical Database Design

Logical Database Design
Well-structured relations encourage anomalies of data.

False
True

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Logical Database Design
A primary key may be null.

False
True

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

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

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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
A relation has which of the following properties?

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

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Logical Database Design
A primary key is which of the following?

A derived attribute
An attribute that uniquely identifies each row
Any attribute
An attribute that uniquely identifies each column

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