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The Definitive Guide to DAX: Business intelligence with Microsoft Excel, SQL Server Analysis Services, and Power BI (Business Skills)
Get Free Ebook The Definitive Guide to DAX: Business intelligence with Microsoft Excel, SQL Server Analysis Services, and Power BI (Business Skills)
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About the Author
Marco Russo and Alberto Ferrari cofounded sqlbi.com, where they regularly publish articles about Microsoft PowerPivot, DAX, Power BI, and SQL Server Analysis Services. They also speak regularly at major international conferences, such as TechEd, Ignite, PASS Summit, and SQLBits. Both consult and mentor on business intelligence (BI) and Microsoft BI technologies, having worked with them since 1999. Their books include Microsoft Excel 2013 Building Data Models with PowerPivot, Microsoft SQL Server 2012 Analysis Services: The BISM Tabular Model, and Microsoft PowerPivot for Excel 2010: Give Your Data Meaning.
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Product details
Series: Business Skills
Paperback: 592 pages
Publisher: Microsoft Press; 1 edition (October 23, 2015)
Language: English
ISBN-10: 073569835X
ISBN-13: 978-0735698352
Product Dimensions:
7.4 x 1.4 x 9 inches
Shipping Weight: 2.2 pounds (View shipping rates and policies)
Average Customer Review:
4.8 out of 5 stars
50 customer reviews
Amazon Best Sellers Rank:
#35,425 in Books (See Top 100 in Books)
This book will give you good insight into how DAX performs "under the hood". I'm fairly advanced in other tools for BI development (Python, R, SQL), but DAX has really given me a hard time. It's not a programming language - I understand that, but coming from a scripting language to DAX has been quite difficult for me. You have to train yourself to think differently about how your data is filtered and stored.This book does many things well.1) After reading it, I'm confident that when I write a calculation, it’s preforming as expected. It's really quite easy to write an expression with correct syntax that you think functions properly, but actually doesn't. I don't worry about that anymore, because, at the end of the day, this book really explains DAX well - quirks and all.2) The companion files that go along with this book are also beautifully put together. You get Power BI, Excel, and DAX Studio files, each with all the tables clearly defined, and all the relationships already made. Obviously, time was taken to make sure you can easily follow through with examples, and you can't say that about many books of this nature.My main problem with this book is how it's written. I wasn't an English major. I don't know all the rules about where a comma goes and why. Also, it's a computer book - I'm not expecting great prose. I'm use to reading programming books that read like dictionaries than anything else. But...1) This book is full of run-on sentences and commas that are clearly in the wrong place. While a sentence's meaning is correct, you'll sometimes end up spending an extra minute or two re-reading it and trying to phrase it so that it makes sense. There are sentences that span four or five lines. Seriously?! They couldn't break it up a little bit?2) In an effort to make the book easier to follow, the author tries to use a conversational style (unsuccessfully, see above). The book tries really hard to read like there's a knowledge person sitting in front of you trying to explain things. But he does this thing where he'll spend two pages explaining something and working through an example, you turn the page again, and the second sentence is "you may have noticed that my explanation is not quite right". !*($(&#*!@#%*!!!!! ...... infuriating, annoying, unacceptable.If this book only did an average job of explaining DAX, I'd give it one or two stars, but the information inside is actually quite good. It's just that the style makes an already difficult topic harder to follow. Buy it. There's not really a better option. I haven't found a book that does a better job of explaining DAX, but be prepared to spend a good amount of time with a pencil and highlighter trying to cut through sloppy writing.
For those who serve in a business intelligence development/analysis context, I cannot recommend this book enough. The title truly fits its content. I work a lot in Microsoft Power BI as a Data Analyst for an energy company and for freelance. This book has provided so much help to me in properly writing DAX formulae...and fixing incorrect formulae. The chapter on evaluation context, though challenging, is certainly the most important aspect of properly understanding and utilizing DAX. Every page of this book is packed with thorough instruction, explanation, and examples. Don't just use this as a reference. Read it left to right so as to gain a good understanding of the breadth and depth of DAX, then continually use it as a reference as you find yourself struggling with various formulaic circumstances.
How to use this book if you are new to DAX. Read the first four chapters and then stop. Go out and find a "beginners guide" kind of source to give you a little insight into Power Query, Power Pivot, and even Power BI. Learn from that source, use the Power suite, make mistakes, get frustrated, and exposure to several different DAX functions. Come back after all that read this book from Chapter five to the end, and a new world will more clearly open unto you.
This is certainly the definitive guide to the DAX language, which is growing in popularity since it can be used in Excel, Power BI, SQL Server Analysis Services, and other Microsoft tools. DAX is quite easy to use in common cases such as creating a calculated column, but in more advanced cases it offers incredible power, provided you know what you're doing. For users who want to go beyond "recipes" and really understand how DAX works, this book provides clear and thorough explanations of the concepts underlying DAX. Further, it offers great insights into the operation and performance of the Vertipaq / xVelocity engine that processes DAX expressions, enabling you to write queries that run as fast as possible. You have to invest time to get the most out of this book, but if you're using DAX in serious BI applications, the payoff is well worthwhile.
If you really want to know and understand how Dax works, then this is the book you want. It is definitely not for beginners but rather delivered a tremendous amount of both breadth and depth about Power Pivot and more specifically Dax. Having read and viewed the whitepapers, blogs and presentations from the authors the book was exactly what I was expecting and wanting. If you need a text to get off the ground with Power Pivot then you will probably want to read something else and get your hands dirty with Power Pivot first. Once you are past the basics and want to go to the deep end of the pool, this is the book you want. It truly is the definitive guide and I highly recommend.
The Definitive Guide to DAX is the BEST, most in-depth treatment of the DAX language and DAX engine (VertiPaq). It is best suited for someone who already is familiar with the DAX language. Every aspect of the DAX language is introduced in a logical progression, including Evaluation Contexts, Time Intelligence, and Relationships. The insight and low-level details that Marco and Alberto provide are unique to this book.Later chapters describe the Vertipaq engine, and how to optimize both the data model and DAX queries. There's also plenty of examples on using DAX Studio (this is something I couldn't find in any other books). If you are looking to REALLY learn DAX, then this book is for you. It takes time and effort to get through all of this material, but it is well worth it. Marco and Alberto are the DAX Masters! Their DAX Workshop video is based upon the content in this book, and is excellent. Highly recommended.
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