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Logical Database Design

Logical Database Design
A candidate key must uniquely identify each row.

True
False

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Logical Database Design
When mapping a regular entity into a relation which of the following is true?

Two relations are created.
Three relations are created.
One relation is created.
Four relations are created.

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Logical Database Design
The relational model consists of:

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

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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
If a relation is in third normal form, it does not need to be in second normal form.

True
False

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Logical Database Design
When mapping a multivalued attribute into a relation which of the following is true?

One relation is created.
Four relations are created.
Three relations are created.
Two relations are created.

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