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Database Redesign

Database Redesign
The SQL-92 command to change a table name is RENAME TABLE.

True
False

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

ALTER TABLE TableName DROP COLUMN ColumnName
MODIFY TABLE TableName DROP COLUMN ColumnName
MODIFY TABLE TableName DROP ColumnName
ALTER TABLE TableName DROP ColumnName

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

False
True

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Database Redesign
Because of the need for extensive knowledge of SQL, many database developers choose to automate the redesign process.

False
True

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Database Redesign
The NOT EXISTS keyword will be true if:

neither of these two conditions is met.
any row in the subquery meets the condition.
all rows in the subquery fail the condition.
both of these two conditions are met.

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Database Redesign
Database redesign is not terribly difficult if the:

database is well-designed.
database is relatively small.
database has no data.
database is structured.

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