Book Image

Getting Started with Talend Open Studio for Data Integration

By : Jonathan Bowen
Book Image

Getting Started with Talend Open Studio for Data Integration

By: Jonathan Bowen

Overview of this book

Talend Open Studio for Data Integration (TOS) is an open source graphical development environment for creating custom integrations between systems. It comes with over 600 pre-built connectors that make it quick and easy to connect databases, transform files, load data, move, copy and rename files and connect individual components in order to define complex integration processes. "Getting Started with Talend Open Studio for Data Integration" illustrates common uses and scenarios in a simple, practical manner and, building on knowledge as the book progresses, works towards more complex integration solutions. TOS is a code generator and so does a lot of the "heavy lifting"ù for you. As such, it is a suitable tool for experienced developers and non-developers alike. You'll start by learning how to construct some common integrations tasks ñ transforming files and extracting data from a database, for example. These building blocks form a "toolkit"ù of techniques that you will learn how to apply in many different situations. By the end of the book, once complex integrations will appear easy and you will be your organization's integration expert! Best of all, TOS makes integrating systems fun!
Table of Contents (22 chapters)
Getting Started with Talend Open Studio for Data Integration
About the Author
About the Reviewers

Chapter 4. Working with Databases

Databases, specifically relational databases, are at the heart of most modern applications and business systems and it is likely that anyone involved in integrating systems will need to interact with databases in some way.

In this chapter, we'll look at using the Studio to work with databases. We will learn about the following topics:

  • Extracting data from a database table

  • Joining data across database tables

  • Writing data to a database table

  • Synchronizing data between databases

  • Modifying data in a database

  • Dynamic database lookup in an integration job

The jobs we create in the chapter use a simple database which is in the Chapter 4 ResourceFiles folder for this chapter. Let's take a moment to look at the database and familiarize ourselves with the data it contains.

There are four tables in the database: products, brands, orders, and order lines. The entity relationship diagram in the next screenshot shows the connections between the tables:

As we go through this chapter...