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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

Disabling query load

Queries' loads can be heavy and sometimes refreshing some tables can impact negatively on performance. This is why it is important to know what data is concretely needed for end users. It is common that you will need some queries just for transformations in Power Query, but you won't need them in the final model. In this recipe, we will see how you can use some queries for enriching data needed for reporting and how you can disable the loading of this supporting table in order to reduce the impact on performance and refreshing.

Getting ready

For this recipe, you need to download the following files:

  • The FactInternetSales CSV file
  • The DimTerritory 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 6.59 – Text/CSV connector

  2. ...
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