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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

Using M syntax and the Advanced Editor

Every step you perform in Power Query will translate into a line of M code. You usually realize what M code is after a while because you start using the features available from the UI at the beginning. Once you get more confident with Power Query steps, you become ready to explore the elements that lie behind them, learn how they work, and how you can create custom transformations by coding. In this recipe, we will see how to access M code and how steps are displayed in the Advanced Editor.

Getting ready

In 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 7.1 – Text/CSV connector

  2. Browse to your local folder where you downloaded the FactInternetSales.csv file and open...
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