Book Image

Pentaho Data Integration 4 Cookbook

Book Image

Pentaho Data Integration 4 Cookbook

Overview of this book

Pentaho Data Integration (PDI, also called Kettle), one of the data integration tools leaders, is broadly used for all kind of data manipulation such as migrating data between applications or databases, exporting data from databases to flat files, data cleansing, and much more. Do you need quick solutions to the problems you face while using Kettle? Pentaho Data Integration 4 Cookbook explains Kettle features in detail through clear and practical recipes that you can quickly apply to your solutions. The recipes cover a broad range of topics including processing files, working with databases, understanding XML structures, integrating with Pentaho BI Suite, and more. Pentaho Data Integration 4 Cookbook shows you how to take advantage of all the aspects of Kettle through a set of practical recipes organized to find quick solutions to your needs. The initial chapters explain the details about working with databases, files, and XML structures. Then you will see different ways for searching data, executing and reusing jobs and transformations, and manipulating streams. Further, you will learn all the available options for integrating Kettle with other Pentaho tools. Pentaho Data Integration 4 Cookbook has plenty of recipes with easy step-by-step instructions to accomplish specific tasks. There are examples and code that are ready for adaptation to individual needs.
Table of Contents (17 chapters)
Pentaho Data Integration 4 Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Processing rows differently based on the row number


There will be some situations where you will need to process the data differently depending on the position or number of each row.

Let's assume that you have a bookstore and want to know the top five bestsellers books, the following 10 bestsellers, and the rest of the books for different purposes (for example, to do a differentiated marketing promotion for each group). To do this, you will divide the list of books into different groups depending on their sales.

Getting ready

You need an Excel spreadsheet file containing a list of books with the following columns:

  • title

  • id_author

  • price, id_title

  • genre

  • sales

This last column represents the quantity of books sold in the last period.

You can download a sample file from the book's website.

How to do it...

Carry out the following steps:

  1. Create a new transformation and drag an Excel Input step from the Input category.

  2. Under the Files tab, browse to and select the sales_books.xls file.

  3. Complete the...