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Getting Started with Tableau 2019.2

Getting Started with Tableau 2019.2

By : Tristan Guillevin
5 (2)
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Getting Started with Tableau 2019.2

Getting Started with Tableau 2019.2

5 (2)
By: Tristan Guillevin

Overview of this book

Tableau is one of the leading data visualization tools and is regularly updated with new functionalities and features. The latest release, Tableau 2019.2, promises new and advanced features related to visual analytics, reporting, dashboarding, and a host of other data visualization aspects. Getting Started with Tableau 2019.2 will get you up to speed with these additional functionalities. The book starts by highlighting the new functionalities of Tableau 2019.2, providing concrete examples of how to use them. However, if you're new to Tableau, you won't have to worry as the book also covers the major aspects of Tableau with relevant examples. You'll learn how to connect to data, build a data source, visualize your data, build a dashboard, and even share data online. In the concluding chapters, you'll delve into advanced techniques such as creating a cross-database join and data blending. By the end of this book, you will be able to use Tableau effectively to create quick, cost-effective, and business-efficient Business Intelligence (BI) solutions.
Table of Contents (16 chapters)
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15
Index

Union your data

If a join adds columns, a union adds rows.

Unions are useful when you have two (or more) tables with an identical structure (the same columns) that you want to combine to create a unique data source.

A typical use case is when you have a dataset that contains one table per year, and you need to compare those years. To do that, you need to combine those different tables into a single data source. You can, of course, spend some time copying and pasting the data into a new table, but with Tableau and unions, you can do this in a few clicks.

Note

To create a union, the different tables must contain the same column names. Otherwise, Tableau will not consider them to be identical and will create new columns.

Let's start with an example.

Hands-on with a union example

For this example, I created an Excel file with two sheets to union.

Note

If you want to reproduce the example, you can download the Union example file from my website, https://tableau2019.ladataviz.com, in Chapter 4: Connect...

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