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

The book "The Definitive Guide to DAX" by Marco Russo and Alberto Ferrari is a highly recommended advanced course for every DAX user. The book is well-organized, well-explained, and divided into chapters covering specific topics. The authors explain the language's general use in the first three chapters and then move onto the meat of the book - chapter 4 that is a deep dive into the contexts and evaluation of DAX expressions. The book also delves into the use cases of specific commands or sub-sets of commands, making it easy for the reader to understand and apply DAX in real-life scenarios. One of the significant Pros of the book is that it covers DAX comprehensively and in-depth. Besides, the language has forever changed business intelligence for many users, enabling them to provide insightful analysis and be game-changers. However, the book is not an encyclopedic A-Z guide of DAX. As such, it spends a lot of time going through scenarios that may or may not apply. In summary, if you understand and get the hang of DAX, it can significantly impact your business intelligence. Therefore, if you plan to use the DAX language, "The Definitive Guide to DAX" is an excellent reference book to have.