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Database Redesign

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

False
True

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

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

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Database Redesign
If a database is built correctly the first time, it will not have to be redesigned.

False
True

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Database Redesign
Correlated subqueries are similar to a regular subquery.

False
True

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Database Redesign
The data model that is produced from reverse engineering is:

None of these
a conceptual model.
a logical model.
an internal model.

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Database Redesign
To drop a column that is used as a foreign key, first:

drop the foreign key constraint.
drop the primary key.
All of these
drop the table containing the foreign key.

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