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Database Redesign

Database Redesign
Dependency graphs are diagrams that consist of nodes and arcs that show the dependencies of a database.

False
True

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

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

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

One
Four
Three
Two

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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
Some organizations take the stand that no application should ever employ the true name of a table.

False
True

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Database Redesign
A regular subquery is processed from the bottom up.

False
True

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