Definitive Guide to DAX, The: Business intelligence for Microsoft Power BI, SQL Server Analysis Services, and Excel (Business Skills)

If you want to masters DAX, it’s the perfect book. They explain complicated things very well. Also they give multiple examples. It’s for all the public, from beginners to experts.

Amazing book, very well written and organised. I normally prefer watching training videos for learning but this has been far better. Concepts are clearly explained. For me, the biggest thing is that you not only learn how, you also learn why. This is very crucial

This books doesn't require a lot of comments. It's the DAX Bible. The Definitive Guide to DAX means what it says - it's The Definitive Guide to DAX. You'll find (almost) everything about DAX in this book. It's not a book for fast reading. This book will stay with you for a while. Use this book to read about DAX, to understand DAX, to practice your DAX (using companion content, which includes a demo database), to optimize your data models and DAX. The book is not easy reading, because DAX is not just a list of functions, DAX is based on the fundamental concepts we need to understand. To understand the concepts of DAX you'll need help of an expert. Marco Russo and Alberto Ferrari are the best DAX experts and their consulting time is really expensive. But they put all their knowledge into this book which will cost you less than $40-50. If you're going to work with DAX you must have this book.

This is a clear, well-written book but the title/blurb is somewhat misleading, as I would consider it to be aimed specifically at advanced/heavy users - or people intending to be advanced users - and it spends all its time on DAX and mostly ignores PowerBI itself. There is a fair amount of material on writing code for which a simple PowerBI off-the-shelf measure or trick already exists, for example. A large part of the book is devoted to optimising queries, which assumes your dataset is 5m+ rows. There is a lot of material related to workarounds for some pretty obscure needs. For some reason the authors are obsessed with correctly calculating percentages of subgroups in tables and there are pages and pages on that throughout the book. Perhaps the most frustrating part is that there is one chapter on basically "how to solve real-world problems with DAX" - for example, making sure your year-on-year comparisons are accurate, or honing your year-to-date analysis - but this is very short; I wish it had been the whole book.

I've found this pretty brilliant so far, I've studied through to chapter 6. They say that chapters 4 and 5, on contexts and CALCULATE respectively, are the absolute key ones to nail and the difficulty does ramp up at this point, but apparently once mastered you're well over halfway there. Some chapters necessitate multiple readings, and you'll need to take notes. The style makes the first reading very easy but re-reading for note taking purposes is slightly more long winded as you have to skip through the educational "wrong" bits to keep only the actual correct stuff. I like this balance though because first read of new concepts in DAX can be very dispiriting. I feel that understanding this book cover to cover will make me a genuine DAX guru, and I would recommend it to you if that's your goal also

Great book for anyone interested in DAX or working with DAX. Very useful especially if you have worked with DAX explaining a lot about the engine and all DAX formulas.

Best book for learning Dax thoroughly, later chapters more technical. I started learning with a more beginners book but when I needed deeper explanation and more advanced material this book is all you need. It’s a Dax bible that should be on everyone’s shelf who wants to learn the untracked of the Dax language

It has it all! Everything in detail and very well written! I have been using Power Bi for the past 5 months and needed to understand how the DAX engine works in detail. This book is great for it!

Un libro ideal para conocer todos los secretos del lenguaje DAX, escrito por dos de sus creadores

Une vraie somme de savoir. Comme le disent les auteurs, il faudra le lire plusieurs fois (et je n'ai pas fini lecture No 1) C'est néanmoins didactique : le livre avance pas à pas (et c'est vrai parfois à grands pas). A mon avis indispensable si on veut comprendre (voire maîtriser) DAX

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This book is brilliant. In very easy to understand language, it takes a deep dive into DAX, explaining the seemingly inexplicable and making sense of complex concepts. This is a book that any-one who plans to write DAX should buy. So as not to mislead you, the book expects you to have a basic understanding of DAX. If you are new to DAX, start off with an introductory book. Soon, you will want to know more and then this is the book for you. Thank-you to the authors for great context and communication.

The book where all concepts are covered without compromising content. Every concept has explained with example and screenshot.