Book Image

Oracle Information Integration, Migration, and Consolidation

Book Image

Oracle Information Integration, Migration, and Consolidation

Overview of this book

The book covers data migration, data consolidation, and data integration, the three scenarios that are typically part of the information integration life cycle. Organizations typically find themselves migrating data to Oracle and either later, or at the same time, consolidating multiple database instances into a single global instance for a department, or even an entire company. The business savings and technical benefits of data consolidation cannot be overlooked, and this book will help you to use Oracle's technology to achieve these goals. This highly practical and business-applicable book will teach you to be successful with the latest Oracle data and application integration, migration, information life-cycle management, and consolidation products and technologies.In this book, you will gain hands-on advice about data consolidation, integration, and migration using tools and best practices. Along the way you will leverage products like Oracle Data Integrator, Oracle GoldenGate, and SQL Developer, as well as Data Hubs and 11gR2 Database. The book covers everything from the early background of information integration and the impact of SOA, to products like Oracle GoldenGate and Oracle Data Integrator. By the end you'll have a clear idea of where information and application integration is headed and how to plan your own projects.
Table of Contents (17 chapters)
Oracle Information Integration, Migration, and Consolidation
Credits
About The Author
About the Contributing Authors
About the Reviewers
www.PacktPub.com
Preface

Impact of database migrations on applications


Database migrations impact applications in many ways. Most common changes to applications include:

  • Connection mechanisms including using vendor-specific drivers. Database drivers from different vendors have different connection string formats and parameters that they support.

  • Applications have to be modified to issue vendor-specific (Oracle) SQL Statements. Such modifications may be minimal if the application uses ANSI standard SQL Statements. For example, SQL Statements with database-specific extensions such as date/timestamp arithmetic need modification.

  • The database access APIs from different vendors differ on how they allow manipulation of cursors, LOBs, system-generated keys, and so on.

  • Error handling may also require manual intervention as databases have different error codes for the same error condition. This task is easier to accomplish if the application uses a central library of error codes and messages so that the full application code...