Book Image

Pentaho 3.2 Data Integration: Beginner's Guide

Book Image

Pentaho 3.2 Data Integration: Beginner's Guide

Overview of this book

Pentaho Data Integration (a.k.a. Kettle) is a full-featured open source ETL (Extract, Transform, and Load) solution. Although PDI is a feature-rich tool, effectively capturing, manipulating, cleansing, transferring, and loading data can get complicated.This book is full of practical examples that will help you to take advantage of Pentaho Data Integration's graphical, drag-and-drop design environment. You will quickly get started with Pentaho Data Integration by following the step-by-step guidance in this book. The useful tips in this book will encourage you to exploit powerful features of Pentaho Data Integration and perform ETL operations with ease.Starting with the installation of the PDI software, this book will teach you all the key PDI concepts. Each chapter introduces new features, allowing you to gradually get involved with the tool. First, you will learn to work with plain files, and to do all kinds of data manipulation. Then, the book gives you a primer on databases and teaches you how to work with databases inside PDI. Not only that, you'll be given an introduction to data warehouse concepts and you will learn to load data in a data warehouse. After that, you will learn to implement simple and complex processes.Once you've learned all the basics, you will build a simple datamart that will serve to reinforce all the concepts learned through the book.
Table of Contents (27 chapters)
Pentaho 3.2 Data Integration Beginner's Guide
Credits
Foreword
The Kettle Project
About the Author
About the Reviewers
Preface
Index

Time for action – calculating scores with JavaScript


The International Musical Contest mentioned in Chapter 4 has already taken place. Each duet performed twice. The first time technical skills were evaluated, while in the second, the focus was on artistic performance.

Each performance was assessed by a panel of five judges who awarded a mark out of a possible 10.

The following is the detailed list of scores:

Note that the fields don't fit in the screen, so the lines are wrapped and dotted lines are added for you to distinguish each line.

Now you have to calculate, for each evaluated skill, the overall score as well as an average score.

  1. Download the sample file from the Packt website.

  2. Create a transformation and drag a Fixed file input step to the canvas to read the file.

  3. Fill the configuration window as follows:

  4. Press the Get Fields button. A window appears to help you define the columns.

  5. Click between the fields to add markers that define the limits. The window will look like this:

  6. Click on Next...