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Database Redesign

Database Redesign
How many copies of the database schema are typically used in the redesign process?

Two
Four
Three
One

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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.

None of these
optimistic
ambivalent
skeptical

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Database Redesign
What SQL command can be used to add columns to a table?

MODIFY TABLE TableName ADD COLUMN ColumnName
ALTER TABLE TableName ADD COLUMN ColumnName
MODIFY TABLE TableName ADD ColumnName
ALTER TABLE TableName ADD ColumnName

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Database Redesign
The EXISTS keyword will be true if any row in the subquery meets the condition.

False
True

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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
Database redesign is especially difficult if the database has no data.

True
False

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