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Database Redesign

Database Redesign
A correlated subquery is processed as a nested subquery.

True
False

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Database Redesign
Typically, there should be at least two different copies of the database schema used in the redesign process.

False
True

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Database Redesign
The NOT EXISTS keyword will be true if any row in the subquery meets the condition.

True
False

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Database Redesign
Because of the importance of making data model changes correctly, many professionals are ________ about using an automated process for database redesign.

ambivalent
None of these
optimistic
skeptical

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Database Redesign
A tool that can help designers understand the dependencies of database structures is a:

None of these
data model.
dependency graph.
graphical display.

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Database Redesign
Which of the following SQL statements are helpful in database redesign?

None of these
Both of the above are helpful
Correlated subqueries only
EXISTS/NOT EXISTS expressions only

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