The Definitive Guide to Power Query (M): Mastering Complex Data Transformation with Power Query

This is definitely not a beginner's guide. It really breaks down M from the bottom up. This means it goes beyond the user interface of Microsoft's Power Query Editor. I have been working with Power Query for more than 5 year, but already in the first 100 pages I wrote down a dozen tips and tricks that I had not learned about before. Highly recommended for anyone who needs to understand how to extract, transform and load your data in a Power BI data model to the highest level.

The title says it all. This is the DEFINITIVE guide to Power Query M-code. An in depth explanation of how the M-code environment works with real examples. Complex topics made simple and easy to understand. You will become an M-code guru from digesting this book.

The item is very good and as I expected

Authored by Greg Deckler, Rick de Groot, and Melissa de Korte, "The Definitive Guide to Power Query (M): Mastering Complex Data Transformation with Power" is a must-have resource for BI developers seeking to deepen their understanding of Power Query. With a keen focus on the M language and structured data manipulation, this book provides comprehensive insights and practical guidance that empower users to harness the full potential of Power Query.

This is a very good book for people who already have some experience of Power Query and want to get serious with it. As the blurb states it is not for beginners. I would most recommend this book for anyone who has reached the stage of struggling to achieve what they want in Power query. It is systematic which can be a little dry at times and some of the examples are overly complicated in an effort to show off the full potential of the features. I found myself saying I wish id known X or Y a few times and know I will be coming back to several sections when I need them. As a programer, the transition to a functional way of working was a little odd to me and this book has changed the way I think about data processing in Power Query. Cant recommend it enough for those who are ready to stop asking google and start understanding how and why things are done. For a casual user its too much. If Power query is something you use on a regular basis then its essential reading. Power Query is part of several systems. If your focus is Power BI like me then the choice between advancing in power query or DAX is less clear cut. Thats not a criticism of this book which is just about Power Query, but most Power BI users will need some Dax to cope with dynamic processing. Power query is all about one off processing on input, where as DAX is dynamic and computationally expensive. I need to study both for work, lets hope the DAX book i bought is as useful as this one.