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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

Setting up parameters

You have the possibility to manage in a flexible way which data to load in the model. You can define parameters and use them in inputs for multiple transformations such as filtering or enriching data. In this recipe, we will see how to define parameters and how to use them when adding a conditional column based on some threshold values where you want to add a flag for each value of an existing column.

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:
    Figure 6.1 – Text/CSV connector

    Figure 6.1 – 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 Data:
    Figure 6.2 – CSV data preview

    Figure 6.2 –...

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