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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

Pattern matching

Pattern matching is an essential skill often associated with regular expressions (or regex), which is important for identifying and manipulating specific patterns in textual data. Although the Power Query M language lacks direct support for regex, it provides a wealth of functions that can help address these types of requirements. In this section, we explore pattern matching within the constraints of Power Query, highlighting some key techniques and strategies for addressing these challenges.

Basics of pattern matching

Pattern matching is incredibly useful for finding and extracting specific character sequences from data. That process relies heavily on the use of text functions. The M language is equipped with various functions that operate on text values. These functions can facilitate certain aspects relevant to pattern matching. They offer a range of capabilities, from basic to more advanced string operations.

Here, we’ll delve into various considerations...

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