Book Image

Pentaho Data Integration Beginner's Guide - Second Edition - Second Edition

By : María Carina Roldán
Book Image

Pentaho Data Integration Beginner's Guide - Second Edition - Second Edition

By: María Carina Roldán

Overview of this book

Capturing, manipulating, cleansing, transferring, and loading data effectively are the prime requirements in every IT organization. Achieving these tasks require people devoted to developing extensive software programs, or investing in ETL or data integration tools that can simplify this work. Pentaho Data Integration is a full-featured open source ETL solution that allows you to meet these requirements. Pentaho Data Integration has an intuitive, graphical, drag-and-drop design environment and its ETL capabilities are powerful. However, getting started with Pentaho Data Integration can be difficult or confusing. "Pentaho Data Integration Beginner's Guide - Second Edition" provides the guidance needed to overcome that difficulty, covering all the possible key features of Pentaho Data Integration. "Pentaho Data Integration Beginner's Guide - Second Edition" starts with the installation of Pentaho Data Integration software and then moves on to cover all the key Pentaho Data Integration concepts. Each chapter introduces new features, allowing you to gradually get involved with the tool. First, you will learn to do all kinds of data manipulation and work with plain files. Then, the book gives you a primer on databases and teaches you how to work with databases inside Pentaho Data Integration. Moreover, you will be introduced to data warehouse concepts and you will learn how to load data in a data warehouse. After that, you will learn to implement simple and complex processes. Finally, you will have the opportunity of applying and reinforcing all the learned concepts through the implementation of a simple datamart. With "Pentaho Data Integration Beginner's Guide - Second Edition", you will learn everything you need to know in order to meet your data manipulation requirements.
Table of Contents (26 chapters)
Pentaho Data Integration Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Best Practices
Index

Time for action – testing the transformation that loads the region dimension


In the previous tutorial, you loaded a dimension that stores geographical information. You ran it once, causing the insertion of one record for each city and a special record with values N/A for the descriptive fields. Let's make some changes in the operational database, and run the transformation again to see what happens.

  1. Launch Squirrel and connect to the js database.

  2. Type the following sentence to change the names of the countries to upper case:

    UPDATE countries SET country_name = UCASE(country_name)
  3. Execute it. You may do this by clicking on the Run button or by pressing Ctrl + Enter.

  4. If the transformation created in the last tutorial is not open, open it again.

  5. Run the transformation.

  6. The Step metrics tab will appear as shown in the following screenshot:

  7. Explore the js_dw database again and do preview a of the lk_regions table. This time you will see the following:

What just happened?

After changing the letter case...