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Power Query Cookbook

Power Query Cookbook

By : Janicijevic
4.5 (14)
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Power Query Cookbook

Power Query Cookbook

4.5 (14)
By: Janicijevic

Overview of this book

Power Query is a data preparation tool that enables data engineers and business users to connect, reshape, enrich, and transform their data to facilitate relevant business insights and analysis. With Power Query's wide range of features, you can perform no-code transformations and complex M code functions at the same time to get the most out of your data. This Power Query book will help you to connect to data sources, achieve intuitive transformations, and get to grips with preparation practices. Starting with a general overview of Power Query and what it can do, the book advances to cover more complex topics such as M code and performance optimization. You'll learn how to extend these capabilities by gradually stepping away from the Power Query GUI and into the M programming language. Additionally, the book also shows you how to use Power Query Online within Power BI Dataflows. By the end of the book, you'll be able to leverage your source data, understand your data better, and enrich it with a full stack of no-code and custom features that you'll learn to design by yourself for your business requirements.
Table of Contents (12 chapters)
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Chapter 6: Optimizing Power Query Performance

Once you become more confident with Power Query and are able to do the main transformations and reshape your data, you are ready to focus on optimizing queries' performance. This topic is important because when you prepare data for reporting or any other further use and you need to refresh data or to retrieve subsets of filtered data, you need to think about and design Power Query steps in a way that helps you to avoid slow queries and suboptimal performance for end users. In this chapter, we will learn how to use concepts such as parameters and query folding that can help you improve queries' loading times.

In particular, you will explore the following performance optimization options within Power Query:

  • Setting up parameters
  • Filtering with parameters
  • Folding queries
  • Leveraging incremental refresh and folding
  • Disabling query load

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