May 2012
Intermediate to advanced
440 pages
9h 1m
English
Content preview from Oracle Advanced PL/SQL Developer Professional GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Procedures
A procedure is a derivative of PL/SQL block structure which is identified by its own specific name. It is stored as a schema object in the database and implements business logic in the applications. For this reason, procedures are often referred to as Business Managers of PL/SQL which not only maintain the business logic repository, but also demonstrate solution scalability and a modular way of programming.
The characteristics of procedures are as follows:
- A procedure can neither be called from a
SELECTstatement nor can it appear as a right-hand operand in an assignment statement. It has to be invoked from the executable section of a PL/SQL block as a procedural statement. - They can optionally accept parameters in
IN,OUT, orINOUT
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