The Oracle PL/SQL Language Pocket Reference is a quick reference guide to the PL/SQL programming language, which provides procedural extensions to the SQL relational database language and a range of Oracle development tools. Where a package, program, or function is supported only for a particular version of the Oracle database (e.g., Oracle Database 11g), we indicate this in the text. The purpose of this pocket reference is to help PL/SQL users find the syntax of specific language elements. It is not a selfcontained user guide; basic knowledge of the PL/SQL programming language is assumed. For more information, see the following O’Reilly books: Oracle PL/SQL Programming, Fourth Edition, by Steven Feuerstein with Bill Pribyl Learning Oracle PL/SQL, by Bill Pribyl with Steven Feuerstein Oracle PL/SQL Best Practices, Second Edition, by Steven Feuerstein Oracle in a Nutshell, by Rick Greenwald and David C. Kreines