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Database Redesign

Database Redesign
How can you find rows that do not match some specified condition?

NOT EXISTS
Double use of NOT EXISTS
EXISTS
None of these

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Database Redesign
Adding null columns to a table is straightforward.

True
False

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Database Redesign
A tool that can help designers understand the dependencies of database structures is a:

data model.
graphical display.
dependency graph.
None of these

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Database Redesign
Information systems and organizations do not just influence each other; they create each other.

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.

True
False

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Database Redesign
Which of the following modifications may not succeed?

Changing a column data type from numeric to char
Neither of the above actions will succeed
Changing a column data type from char to date
Both of the above actions should succeed

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