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Power Query Cookbook

You're reading from   Power Query Cookbook Use effective and powerful queries in Power BI Desktop and Dataflows to prepare and transform your data

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Product type Paperback
Published in Oct 2021
Publisher Packt
ISBN-13 9781800569485
Length 412 pages
Edition 1st Edition
Languages
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Author (1):
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Andrea Janicijevic Andrea Janicijevic
Author Profile Icon Andrea Janicijevic
Andrea Janicijevic
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Table of Contents (12) Chapters Close

Preface 1. Chapter 1: Getting Started with Power Query 2. Chapter 2: Connecting to Fetch Data FREE CHAPTER 3. Chapter 3: Data Exploration in Power Query 4. Chapter 4: Reshaping Your Data 5. Chapter 5: Combining Queries for Efficiency 6. Chapter 6: Optimizing Power Query Performance 7. Chapter 7: Leveraging the M Language 8. Chapter 8: Adding Value to Your Data 9. Chapter 9: Performance Tuning with Power BI Dataflows 10. Chapter 10: Implementing Query Diagnostics 11. Other Books You May Enjoy

Adding columns from examples

We often need to add new columns based on the structure or values of an already existing column or set of columns. Imagine you want to extract information from an existing column quickly or to concatenate some values by typing an example and then apply an underlying rule to all the values of that column. These scenarios can be easily achieved by building new content by adding columns from examples. In this recipe, we will see how to best leverage this feature.

Getting ready

For this recipe, you need to download the FactInternetSales CSV file.

In this example, we will refer to the C:\Data folder.

How to do it…

Once you open your Power BI Desktop application, you are ready to perform the following steps:

  1. Click on Get data and select the Text/CSV connector.
  2. Browse to your local folder where you downloaded the FactInternetSales CSV file and open it. The following window with a preview of the data will pop up; click on Transform...
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