What are stand-alone procedures?

What are stand-alone procedures?
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Answer :

Procedures that are not part of a package are known as stand-alone because they  independently defined. A good example of a stand-alone procedure is one written in a  SQL*Forms application. These types of procedures are not available for reference from other  Oracle tools. Another limitation of stand-alone procedures is that they are compiled at run  time, which slows execution.
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