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Tableau Certified Data Analyst Certification Guide

You're reading from   Tableau Certified Data Analyst Certification Guide Ace the Tableau Data Analyst certification exam with expert guidance and practice material

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Product type Paperback
Published in Jun 2024
Publisher Packt
ISBN-13 9781803243467
Length 462 pages
Edition 1st Edition
Tools
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Authors (2):
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Daisy Jones Daisy Jones
Author Profile Icon Daisy Jones
Daisy Jones
Harry Cooney Harry Cooney
Author Profile Icon Harry Cooney
Harry Cooney
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Table of Contents (11) Chapters Close

Preface 1. Chapter 1: Connecting to Data FREE CHAPTER 2. Chapter 2: Transforming Data 3. Chapter 3: Calculations 4. Chapter 4: Grouping and Filtering 5. Chapter 5: Charts 6. Chapter 6: Dashboards 7. Chapter 7: Formatting 8. Chapter 8: Publishing and Managing Content 9. Chapter 9: Accessing the Online Practice Resources 10. Other Books You May Enjoy

Cleaning Data in Tableau Prep

When a more comprehensive cleaning of a data source is required to ensure the analysis is accurate, the best tool to use is Tableau Prep. An example of this could be three distinct Sales data sources from offices in three different regions, each of them with their own methodology. Although the general metrics might be the same, the specific names of fields, the calculation logic applied, and the level of data aggregation may differ between each office. In this case, all three of the data sources can be cleaned in separate streams in Tableau Prep until they all have a common format, before combining them all together.

Tableau Prep offers a wide variety of data cleaning functionalities. Tableau Prep works by inputting data, which then goes through a series of logical steps. One of the logical steps available is called the clean step, and it provides all of the functionalities available for cleaning data in Tableau Prep.

To filter out outliers or unnecessary...

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