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Learning Pentaho Data Integration 8 CE

You're reading from   Learning Pentaho Data Integration 8 CE An end-to-end guide to exploring, transforming, and integrating your data across multiple sources

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Product type Paperback
Published in Dec 2017
Publisher Packt
ISBN-13 9781788292436
Length 500 pages
Edition 3rd Edition
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Author (1):
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María Carina Roldán María Carina Roldán
Author Profile Icon María Carina Roldán
María Carina Roldán
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Toc

Table of Contents (17) Chapters Close

Preface 1. Getting Started with Pentaho Data Integration 2. Getting Started with Transformations FREE CHAPTER 3. Creating Basic Task Flows 4. Reading and Writing Files 5. Manipulating PDI Data and Metadata 6. Controlling the Flow of Data 7. Cleansing, Validating, and Fixing Data 8. Manipulating Data by Coding 9. Transforming the Dataset 10. Performing Basic Operations with Databases 11. Loading Data Marts with PDI 12. Creating Portable and Reusable Transformations 13. Implementing Metadata Injection 14. Creating Advanced Jobs 15. Launching Transformations and Jobs from the Command Line 16. Best Practices for Designing and Deploying a PDI Project

Previewing and getting data from a database


Now that you have a database ready to use, let's start by querying. In this section, you will learn how to run both simple and advanced queries.

Getting data from the database with the Table input step

The Table input step is the main step to get data from a database. To run very simple queries, the use of this step is straightforward, as explained in this example:

  1. Create a new Transformation.
  2. From the Input category of steps, select and drag to the work area a Table input step.
  3. Double-click on the step.
  4. As Connection, you should see the pagila connection selected by default. If not, select it.

Note

The pagila connection appears by default because it's the only connection in your environment. In case you have more connections, you should choose the one that you will use.

  1. Click on the Get SQL select statement... button. The Database Explorer window appears.
  2. Expand the tables list, select city, and click on OK.
  3. PDI asks you if you want to include the field...
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