It is simply a feature of PL/SQL that allows you to datatype variables to a maximum value of 32767, while RDBMS character maximums are set much lower. Since PL/SQL would be using a varchar2 to type a variable which will only have scope for the life of the PL/SQL block in which it is declared, we are allowed to create a much larger "memory type" than if we were creating a column in a table which will require permanent storage.
For More Information
- What do you think about this answer? E-mail the editors at editor@searchDatabase.com with your feedback.
- The Best Oracle Web Links: tips, tutorials, scripts, and more.
- Have an Oracle or SQL tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
- Ask your technical Oracle and SQL questions -- or help out your peers by answering them -- in our live discussion forums.
- Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.
This was first published in March 2002