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Tableau Prep Cookbook

You're reading from   Tableau Prep Cookbook Use Tableau Prep to clean, combine, and transform your data for analysis

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Product type Paperback
Published in Mar 2021
Publisher Packt
ISBN-13 9781800563766
Length 288 pages
Edition 1st Edition
Tools
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Author (1):
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Hendrik Kleine Hendrik Kleine
Author Profile Icon Hendrik Kleine
Hendrik Kleine
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Table of Contents (11) Chapters Close

Preface 1. Chapter 1: Getting Started with Tableau Prep 2. Chapter 2: Extract and Load Processes FREE CHAPTER 3. Chapter 3: Cleaning Transformations 4. Chapter 4: Data Aggregation 5. Chapter 5: Combining Data 6. Chapter 6: Pivoting Data 7. Chapter 7: Creating Powerful Calculations 8. Chapter 8: Data Science in Tableau Prep Builder 9. Chapter 9: Creating Prep Flows in Various Business Scenarios 10. Other Books You May Enjoy

Extracting substrings

More often than not, data is delivered to us in a less-than-ideal state, with multiple values being held in a single field. We saw how to split data into multiple fields in the Splitting columns with multiple values recipe, in Chapter 3, Cleaning Transformations. However, splitting fields relies on the data being organized, and will never leave out any of the data. In this recipe, we'll look at extracting substrings, which will result in new fields as well. However, unlike splitting fields, we'll be able to more narrowly define what data we want to include in our new field. Furthermore, extracting substrings is non-destructive, that is, the original field will remain unaffected. In this recipe, we'll load a dataset into Tableau Prep that has a field with multiple values in it. We'll then proceed to extract each value and create separate fields for each.

Getting ready

To follow along with this recipe, download the Sample Files 7.3 folder...

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