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The Definitive Guide to Power Query (M)

You're reading from   The Definitive Guide to Power Query (M) Mastering complex data transformation with Power Query

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Product type Paperback
Published in Mar 2024
Publisher Packt
ISBN-13 9781835089729
Length 758 pages
Edition 1st Edition
Languages
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Authors (3):
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Greg Deckler Greg Deckler
Author Profile Icon Greg Deckler
Greg Deckler
Melissa de Korte Melissa de Korte
Author Profile Icon Melissa de Korte
Melissa de Korte
Rick de Groot Rick de Groot
Author Profile Icon Rick de Groot
Rick de Groot
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Toc

Table of Contents (19) Chapters Close

Preface 1. Introducing M FREE CHAPTER 2. Working with Power Query/M 3. Accessing and Combining Data 4. Understanding Values and Expressions 5. Understanding Data Types 6. Structured Values 7. Conceptualizing M 8. Working with Nested Structures 9. Parameters and Custom Functions 10. Dealing with Dates, Times, and Durations 11. Comparers, Replacers, Combiners, and Splitters 12. Handling Errors and Debugging 13. Iteration and Recursion 14. Troublesome Data Patterns 15. Optimizing Performance 16. Enabling Extensions 17. Other Books You May Enjoy
18. Index

Summary

In this chapter, we dove into the world of extending Power Query’s capabilities by adding a custom function library and creating a custom connector. Power Query is a powerful data transformation and integration tool, but its true potential can be unleashed by developing your own connectors to access specialized data sources or APIs. This allows you to bring in data from unique systems or services that are not natively supported by Power Query.

We began by preparing a development environment, including configuring Visual Studio Code, the Power Query SDK, and elements of Discord, our target data source. Next, we created and explained the base template for custom Power Query extensions. We then coded and configured OAuth authentication for our custom connector. Additionally, we wrote the custom M code for retrieving data from the Discord API and presenting a navigation experience for the Navigator dialog found in Power Query UI. Finally, we demonstrated how to install...

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