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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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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

Parameters

Parameters in Power Query play an important role in making queries dynamic. Think of them as variables that you can tweak to change the behavior of your queries. As you go through this chapter, you’ll discover how parameters are a useful building block for storing and managing values. We will delve into what they are, how you can create one, and look at where and how to use them.

Understanding parameters

Parameters are placeholders that make it easy to adapt and manage your queries. They allow for the input of scalar values like dates, numbers, or text, without the need to hardcode these values directly into the queries. This design enables you to make external modifications to a single parameter, which then automatically propagates updates across multiple queries or steps within a query.

Typical use cases for using parameters provide flexibility by allowing a user to:

  • Choose a server and database name. This allows users to switch between development...
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