The Definitive Guide to Power Query (M): Mastering complex data transformation with Power Query
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Learn how to use the Power Query M formula language and its functions effectively for better data modeling and impactful business intelligence reports.
Purchase of the print or Kindle book includes a free PDF eBook
Key FeaturesGet comprehensive coverage of fundamental and advanced Power Query conceptsGain hands-on experience with practical examples based on real-world problemsDelve into the intricacies of Power Query M language for enhanced data manipulationBook Description
Data transformation is a critical step in building data models and business intelligence reports. Power Query is an invaluable tool for anyone who wants to master data transformation, and this book will equip you with the knowledge and skills to make the most of it.
The Definitive Guide to Power Query (M) will help you build a solid foundation in the Power Query M language. As you progress through the chapters, you’ll learn how to use that knowledge to implement advanced concepts and data transformations. This will set the stage for an uncompromisingly thorough exploration of the Power Query M Language.
You’ll also get to grips with optimizing performance, handling errors, and implementing efficient data processing techniques. As this is a hands-on guide, the practical examples in the chapters will help you gain the skills to apply Power Query to real-world problems and improve your data analysis capabilities.
By the end of this book, you will be able to leverage all of Power Query’s remarkable capabilities for data transformation.
What you will learnGain a strong understanding of Power Query fundamentalsMaster various functions within Power Query to perform complex data operationsAcquire knowledge about values, types, and control structures in Power QueryDevelop proficiency in error handling techniquesLearn performance optimization strategies for Power QueryApply what you’ve learned to real-world scenarios, including common troublesome patternsWho this book is for
This book is for business analysts, business intelligence professionals, and power business users working with data who want to add Power Query mastery to their resume. This book will be beneficial for anyone who wants to automate their process of data cleaning and save huge amount of time. Having some basic experience in Power Query is recommended.
Table of ContentsIntroducing MWorking with Power Query/MAccessing and Combining DataUnderstanding Values and ExpressionsUnderstanding Data TypesStructured ValuesConceptualizing MWorking with Nested StructuresParameters and Custom FunctionsDealing with Dates, Times, and DurationsComparers, Replacers, Combiners, and SplittersHandling Errors and DebuggingIteration and RecursionTroublesome Data PatternsOptimizing PerformanceEnabling Extensions
From the Publisher
What parts of the book are your favorites, and why?
Definitely the practical examples. They really help to see how everything fits together in real life, not just theoretically.
It’s pretty cool when those examples stimulate creative thinking and give you a sense that you’re not just learning but actually doing—applying your knowledge, tackling real-world problems, using data in creative ways, and managing challenges with the expertise of someone who’s been at it for years. This book will show you how to use M code in real-life situations, inspire innovative thinking and problem-solving, and encourage you to develop your own solutions, enabling you to transcend the limitations of the user interface.
Key topics Foundational to advanced Power Query/M concepts Understanding data structures and expressions Hands-on data transformation techniques Best practices for writing M expressions Performance optimization considerations Practical use cases and examples
In what ways have you been active in the Power Query/M community?
It’s really exciting to see how much more popular Power Query has become recently. Not long ago, only a few people were using it, and there wasn’t much information out there. But now, we’re seeing a lot more users and a lot more discussion about it. As authors, we’ve been working hard to spread the word about Power Query. We write articles, make YouTube videos, and join conversations on places like the Fabric Community forums.
However, we noticed there was still something missing in the documentation for the M language. The official guides from Microsoft are great for basics like syntax and offer some examples, but they often don’t go into the nitty-gritty details. To fill this gap, I launched a new website in 2023, called powerquery.how, which dives deeper and has detailed discussions on the different parts of the M language. This book is the natural evolution of that process and includes lots of practical examples to help you understand all the concepts better.
What sets this book apart from other books on Power Query?
There are a number of fine books on Power Query. However, what sets The Definitive Guide to Power Query (M) apart is its focus on the M language. Most Power Query books focus on what can be done in the Power Query Editor user interface with maybe one or two chapters that go in-depth with the M language.
The Definitive Guide to Power Query (M) flips that structure on its head. Here, there’s only one chapter that focuses on the user interface of the Power Query Editor, while every other chapter focuses on the M language itself. This focus allows us to cover the M language and what can be done with the M language in a much more comprehensive way compared to any other resource out there.
Publisher : Packt Publishing (March 29, 2024)
Language : English
Paperback : 758 pages
ISBN-10 : 1835089720
ISBN-13 : 978-1835089729
Item Weight : 2.86 pounds
Dimensions : 1.41 x 7.5 x 9.25 inches
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13 reviews for The Definitive Guide to Power Query (M): Mastering complex data transformation with Power Query
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Sydney –
Great resource for those who want to focus on M, not Dax
I have several Power BI books but most focus more on Power Pivot and Dax than Power Query. This book is enormous and it’s all PQ. I’ve got the thing bookmarked from front to back. Great reference for problem-solving and detailed PQ knowledge.
Not public –
A great foundational reference for Power Query (M)
I have been working with Power BI for 8 years and have been about as deeply immersed in Power Query as one can be for most of that time. I’m only 400 pages in but have already learned several techniques and concepts I didn’t know I was missing. This has served to tie together other key concepts and strengthen my skills.While I agree with an earlier reviewer who wrote “This book is geared more for someone familiar with Power Query”, somebody new to Power Query who recognizes the importance of learning to use this powerful data transformation tool will find this to be a vital resource.This book stands out among so many technical books in that it functions equally well as one you can read through from front to back while working through the examples and as one you can go to when researching a solution to a specific challenge.
Michael Pineiro –
Great Resource for M for Power Query Users of All Levels
The book begins with a brief history on the M Language then moves into the Power Query Editor. It provides you with step-by-step instructions to guide you through examples with practice files. It highlights topics such as Nested Structures, Working with Dates and Times; Splitting, Replacing, and Combing Text, Debugging, Query Optimization, and Extensions to name a few areas. While Iâve used Power Query and M for several years, I recommend this book as there is always more to learn and it can serve as a great reference for both beginners and experienced Power Query users.
Paul Gerber –
A Game-Changing Resource for Power Query Enthusiasts!
As someone deeply immersed in the world of data analysis and Power BI, I’ve eagerly awaited a comprehensive guide that truly unlocks the potential of Power Query. “The Definitive Guide to Power Query (M)” exceeds all expectations and stands as a monumental achievement in the field.Having had the privilege of interacting with Melissa de Korte, Greg Deckler, and Rick de Groot on several occasions, I can attest to their expertise and dedication to empowering data professionals. Their passion shines through every page of this book, making complex concepts accessible to both novices and seasoned practitioners alike.What truly sets this book apart is its practical approach to mastering complex data transformations. The authors don’t just teach you how to use Power Query; they equip you with the skills to tackle real-world challenges with confidence and efficiency. The depth of coverage is unparalleled, providing insights and techniques that I’ve struggled to find elsewhere.I’d be remiss not to express my heartfelt gratitude to Brian Julius, whose mentorship and guidance played a pivotal role in my journey through the realms of data analysis and Power BI. His expertise and encouragement have been invaluable, and I’m thrilled to see his influence acknowledged in this book.”The Definitive Guide to Power Query (M)” is more than just a reference manual; it’s a roadmap to mastery. Whether you’re a data analyst, business intelligence professional, or enthusiast eager to harness the power of Power Query, this book is an indispensable companion on your quest for excellence.In conclusion, I wholeheartedly recommend this book to anyone seeking to elevate their data analysis skills and unleash the full potential of Power Query. Melissa, Greg, Rick, and Brian have created a masterpiece that will undoubtedly leave a lasting impact on the data community.Bravo!
Brady –
Cracking the code on Power Query
Was recommended this book since I work in Power BI and Power Query (M) daily and it has been fantastic. I often have used tables such as a calendar table and admittedly had copied and pasted into the advanced editor what others had built. Now this book makes me feel like I’ve cracked the code into understanding exactly what is going on and making custom changes I wouldn’t otherwise be able to do in the UI experience of transforming data. It’s well worth it to take your time with this book and understand the M power query language more in-depth. The authors did a great job of breaking it down.
Pauline –
Great Resource for Power Query!
This book was a big help in learning Power Query (M). It covers the basics well and goes into some more complex topics for when you’re ready. I liked the real-world examples that showed how to use Power Query to solve real problems.If you’re looking to improve your data transformation skills in Power BI or Excel, this book is a solid choice!
Kindle Customer –
Not for beginners but will help gain more knowledge!
This book is geared more for someone familiar with Power Query. I have used Power BI for several years and this book is a benefit.I could have used this on a consulting project when I needed knowledge for query folding as discussed in this book.Overall it is an excellent resource for anyone wanting to get the definitive explanation of Power Query/M.Even if you have no prior experience get it. It will be hard at times but the knowledge you gain will be worth it.I would recommend this book to my colleagues and plan on using this as a reference.
Maria Malmquist –
Perfect for someone in my shoes
the examples used in the book are drawn from real-world scenarios, making the lessons not only educational but also highly relevant. The inclusion of troubleshooting advice and ways to optimize your queries ensures that you will be well-equipped to tackle any challenges in your data projects.this book is an indispensable resource for anyone looking to become proficient in data analysis and manipulation. Itâs clear, engaging, and full of invaluable insights that will no doubt elevate your data skills. Highly recommended for anyone in BI.
Toronto Bob –
This is the missing piece for anyone looking for M information. I have reached the point where the UI and minor tweaks in the advanced editor no longer meet every need. This book is helping me to go to the next level.
Urs –
This book contains valuable information about power query.
Gus Reyes –
As a Data Analyst Tutor, I highly recommend “The Definitive Guide to Power Query (M)” by Greg Deckler, Rick de Groot, and Melissa de Korte.I believe that If you work with data, this book is a game-changer, whether you’re new to Power Query or an experienced user. The authors excel at breaking down even the most complex topics into clear and easy-to-understand explanations. It’s like having your own personal Power Query tutor on hand, ready to answer your questions at any skill level.Forget theory overload! This book focuses directly on what you need: accomplishing tasks with Power Query. It starts with the basics of data wrangling and then takes you up to some seriously impressive M code. The best part? There are tons of real-life examples and tutorials, so you can put your newfound skills to work right away. This really helped me level up my skills in my application for M. Lots of best practices to take away!I’d recommend it to anyone who’s looking to learn more.I think this book is a treasure trove, whether you’re new to data analysis or looking to streamline your prep work. The chapters are awesome – easy to jump into specific topics if you need a refresher, or perfect for a deep dive cover-to-cover. Plus, they wrap up nicely with clear summaries, so you never feel lost. It’s like having a cheat sheet for anything data-related.Moreover, the GitHub code bundles included are extremely useful for hands-on practice with the book’s material. The authors also delve into advanced topics such as custom functions, enabling extensions, and using nested structures, making this resource particularly comprehensive and insightful.This book is a fantastic investment for anyone serious about leveraging the full potential of Power Query in Power BI or Excel. I will be using it regularly to bring back some best practices to my training and share with my apprentices what I have learned from it.To finish this, I would like to thank Brian Julius for all the recent posts related to Power Query lots of them link to this book, and the foreword of this book of course.Thanks to Vignesh Raju ð¯ðð¯ð Raju for allowing me to read this fantastic masterpiece, next “Extending PowerBI with Python and R”.Wish me luck, these are beasts I always wanted to tame!
Sarabjit –
Book is so good, build quality is very goodContents are are so usefull to understand m languageImpressBut after publisers in India is so badWhen you u have to wait when this book will be dispatched, like after order only they are going to print and after print they dispatch the bookEven one time I got wrong book even non topic like medical bookAfter ao many try order and cancelling the order again order I got the bookCost is little high but good as on now approx rs1800
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