Oracle is a relational database technology developed by Oracle.PL/SQL is available in Oracle Database (since version 6 - stored PL/SQL procedures/functions/packages/triggers since version 7), Times Ten in-memory database (since version 11.2.1), and IBM DB 2 (since version 9.7).Oracle Corporation usually extends PL/SQL functionality with each successive release of the Oracle Database.PL/SQL is a procedural extension of SQL, making it extremely simple to write procedural code that includes SQL as if it were a single language.This book gives a brief overview of some of the important points you should consider when first trying to learn PL/SQL.