Changing cardinalities in a database is:

A. a common database design task.

B. a rare database design task, but does occur.

C. a database design task that never occurs.

D. is impossible to do, so a new database must be constructed and the data moved into it.

Answer: Option A

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Related Questions on Database Redesign

Which is not true of a correlated subquery?

A. EXISTS/NOT EXISTS is a form of a correlated subquery.

B. The processing of the SELECT statements is nested.

C. They can be used to verify functional dependencies.

D. They are very similar to a regular subquery.