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Database Redesign

Database Redesign
Which SQL-92 standard SQL command can be used to change a table name?

None of these
CHANGE TABLE
ALTER TABLE
RENAME TABLE

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Database Redesign
Correlated subqueries are similar to a regular subquery.

False
True

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Database Redesign
It is not easy to build a database correctly the first time.

True
False

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Database Redesign
Reverse engineering is the process of reading a database schema and producing a data model from that schema.

True
False

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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
EXISTS/NOT EXISTS expressions only
Correlated subqueries only

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

Two
One
Three
Four

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