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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
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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

Comparison criteria

Now examine the books on your shelf; do you notice one that is out of place? Take it. Determining its proper location requires comparison. You will compare the book in your hands to others on the shelf by applying specific criteria, repeating that process until you find its rightful place. The same holds true for data. By setting relevant criteria, you can order it in meaningful ways, such as ordering month names from January to December, weekdays from Monday to Sunday, and so on.

Comparison criteria can be used to arrange data according to specific logic. In this section, we will explore various methods provided by the Power Query M language for defining comparison criteria to order values. We’ll use the List.Sort and Table.Sort functions as examples to show how you can create custom rules and gain exact control over the ordering of data.

Numeric value

When sorting data using Table.Sort, you can designate any numerical value to signify a desired...

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