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The Definitive Guide to Power Query (M)

You're reading from The Definitive Guide to Power Query (M)

Product type Book

Published in Mar 2024

Publisher Packt

ISBN-13 9781835089729

Pages 758 pages

Edition 1st Edition

Languages

Concepts

Authors (3):

Gregory Deckler

Rick de Groot

Melissa de Korte

View More author details

Table of Contents (19) Chapters

Preface

1. Introducing M

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

Understanding Data Types

In the previous chapter, we looked at the role of values in shaping expressions and queries within the M language. We learned how values interact with various operators and functions and their unique characteristics. Building upon this knowledge, let’s continue this journey by turning our attention to data types.

Data types serve as a classification system for values, providing information about their structure and usage within M. Understanding data types is crucial for effectively using M and storing values efficiently. In this chapter, we provide a comprehensive overview of data types, their significance, and their application in practical scenarios.

We will start by examining why data types are important. You’ll discover the various data types in M and the contexts in which they are used. We also explain how to identify and understand different data types, with a focus on type conversion. Additionally, this chapter introduces facets...

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Authors (3)

Gregory Deckler

Greg Deckler is a 7-time Microsoft MVP for Data Platform and an active blogger and Power BI community member, having written over 6,000 solutions to community questions. Greg has authored many books on Power BI, including Learn Power BI 1st and 2nd Editions, DAX Cookbook, Power BI Cookbook 2nd Edition and Mastering Power BI 2nd Edition. Greg has also created several external tools for Power BI and regularly posts video content to his YouTube channels, Microsoft Hates Greg and DAX For Humans.

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Rick de Groot

Rick de Groot was born in the Netherlands and has been working in BI for more than 14 years. He went freelance in 2016 and now works as an independent Power BI consultant. On his mission to make Power BI more accessible, he started two blogs: BI Gorilla and PowerQuery. how, and a YouTube channel sharing Power Query and Power BI content. His commitment to offering free content through multiple platforms has led him to earning the Microsoft Data Platform MVP award for two consecutive years.

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Melissa de Korte

Melissa de Korte's approach to facing challenges is fueled by relentless curiosity. She is a dedicated community member and content creator. Her portfolio includes blogs, tutorials, courses, and webinars, that make Power Query M more accessible and useful for all. Behind her professional persona lies a genuine dedication to empowering others through education and knowledge sharing, and a desire to encourage professionals to embrace the potential of Power Query, M.

See other products by Melissa de Korte

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