Book Image

Oracle Warehouse Builder 11g R2: Getting Started 2011

Book Image

Oracle Warehouse Builder 11g R2: Getting Started 2011

Overview of this book

In today's economy, businesses and IT professionals cannot afford to lag behind the latest technologies. Data warehousing is a critical area to the success of many enterprises, and Oracle Warehouse Builder is a powerful tool for building data warehouses. It comes free with the latest version of the Oracle database.Written in an accessible, informative, and focused manner, this book will teach you to use Oracle Warehouse Builder to build your data warehouse. Covering warehouse design, the import of source data, the ETL cycle and more, this book will have you up and running in next to no time.This book will walk you through the complete process of planning, building, and deploying a data warehouse using Oracle Warehouse Builder. By the book's end, you will have built your own data warehouse from scratch.Starting with the installation of the Oracle Database and Warehouse Builder software, this book then covers the analysis of source data, designing a data warehouse, and extracting, transforming, and loading data from the source system into the data warehouse. You'll follow the whole process with detailed screenshots of key steps along the way that have all been updated for the new Fusion Client Platform interface in 11gR2, alongside numerous tips and hints not covered by the official documentation. You’ll finish up with a brand new chapter on code templates where you’ll implement a complete mapping using JDBC connectivity and code template mappings.
Table of Contents (17 chapters)
Oracle Warehouse Builder 11gR2: Getting Started 2011
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Chapter 6. ETL: Putting it Together

We had our first introduction to the process of ETL in the last chapter where we discussed what it is and saw the features the Warehouse Builder has for designing our ETL processes. We looked at the Mapping Editor, which is the main interface we'll use to build our ETL mappings. We also looked at the objects in OWB that we can use. However, we didn't get to do anything other than just look. We have all this new knowledge and are ready to use it. So let's work on designing a mapping, which will make use of some of the features we looked at in the last chapter.

We've looked in detail at the source structures in Chapter 2 and talked about staging data in Chapter 5. In the previous chapters, we've also talked about the concepts of extraction, transformation, and loading of data that will be required to get the source data from our source to our target structure. We will get to put all this together in this chapter as we begin to design and build our mappings...