The NOT EXISTS keyword will be true if any row in the subquery meets the condition.

More Questions from Database Redesign

• It is not easy to build a database correctly the first time.
• Adding null columns to a table is straightforward.
• Some organizations take the stand that no application should ever employ the true name of a table.
• Information systems and organizations do not just influence each other; they create each other.
• Reverse engineering is the process of reading a database schema and producing a data model from that schema.
• Typically, there should be at least two different copies of the database schema used in the redesign process.
• Although creating test databases is a critical and necessary job, there are few career opportunities in this area.
• A regular subquery is processed from the bottom up.
• Dependency graphs are diagrams that consist of nodes and arcs that show the dependencies of a database.
• The EXISTS keyword will be true if any row in the subquery meets the condition.

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