Sql, Pl/Sql - The Prog. Language Of Oracle - 3Rd Rev. Edn.

Book excerpt: Oracle's Workgroup or Enterprise Server, are the world's largest selling RDBMS products. It is estimated that the combined sales of both these Oracle products account for more than 80% of RDBMS products. It is estimated that the combines sales of both these Oracle products account for more than 80% of RDBMS engines sold worldwide.A very large amount of commercial applications are developed around these products. Most ERP software such as SAP R3, Avalon, Marshall, PeopleSoft, Oracle Applications and a host of other such client software work with the Oracle RDBMS engine worldwide.Whether a corporate entity chooses to use Oracle Work Group of Enterprise Server, the natural programming language of both of these products in ANSI SQL and PL/SQL. This book has been written to address the need of programmers who wish to have a ready reference book, with examples, which covers ANSI SQL and PL/SQL.The creating of User Defined Functions, Procedures, Database triggers and other specific data processing PL/SQL code blocks for commercial applications will always required programmers who can code comfortably in ANSI SQL and PL/SQL.Exception handling, Oracle's default locking and User defined locking has been covered in a fair amount of detail. However these areas are of great interest to commercial application developers Programmers with these explicit skills will always find employment in that segment of the software industry, which develops commercial applications.I have tried to use my extensive commercial application development experience in Oracle using ANSI SQL and PL/SQL to produce a book that has answers to most of the questions that seem to puzzle programmers in ANSI SQL and PL/SQL.Every single programming question has not been answered, indeed if I tried to actually do that I would fail since I believe that I myself have not encountered every single programming problem. However, I''ve chosen several key areas in commercial applications and tried to address a set of issues that most commercial applications developers require.Concepts are built using simple language. Examples have easily understood logic. Once this is grasped, the skill gained, must allow any commercial application developer to develop programs in ANSI SQL and PL/SQL very very quickly