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Getting Started with Tableau 2019.2 - Second Edition

You're reading from Getting Started with Tableau 2019.2 - Second Edition

Product type Book

Published in Jun 2019

Publisher Packt

ISBN-13 9781838553067

Pages 260 pages

Edition 2nd Edition

Languages

Concepts

Business Intelligence

Author (1):

Tristan Guillevin

Table of Contents (16) Chapters

Preface

1. Catching Up with Tableau 2019

2. The Tableau Core

3. Getting Started with Tableau Desktop

4. Connecting to Data and Simple Transformations

5. Building an Efficient Data Source

6. Design Insightful Visualizations

7. Powerful Dashboards, Stories, and Actions

8. Publishing and Interacting in Tableau Server

9. An Introduction to Calculations

10. Analytics and Parameters

11. Advanced Data Connections

12. Dealing with Security

13. How to Keep Growing Your Skills

A. Other Books You May Enjoy

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Index

Live or Extract

When you connect to a file or a server, on the data source workplace, in the top-right corner, you have the option to use a Live or Extract connection, as you can see in the following screenshot:

There is a big difference between these two options, so let's look at them in detail.

Live

A Live connection creates a direct link between the Tableau data source and your data (server or file). It means that, if the data changes, you see the impact in Tableau directly after actualizing the data source, or when you reopen the workbook.

The problem with a Live connection is that you are dependent on the performance of the database. Large text files, big Excel files, or an unoptimized database can be very slow to analyze in Tableau. Also, if you are connected to an online database, you are dependent on the internet connection, and you won't be able to work offline. Every time you use a field from your data source, Tableau sends a query to the database, meaning that if there...

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Authors (1)

Tristan Guillevin

Tristan Guillevin is a Business Analyst at Ogury. In 2017, he won the Iron Viz - the ultimate data visualization battle, organized by Tableau every year in Las Vegas. His passion for data visualization and for Tableau has taken him around the world. He enjoys helping people with Tableau by making webinars, conferences, and writing blog articles.

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