The definitive guide to DAX is a comprehensive and authoritative textbook aimed at students and professionals in the fields of business intelligence, data modeling, and analytics. Written by leading Microsoft BI experts Marco Russo and Alberto Ferrari, this book provides an in-depth introduction to the DAX language. Readers will be empowered to understand how DAX works, including the differences from other programming languages. The book covers both basic and advanced concepts to perform powerful data analyses. It is an essential reference for anyone looking to leverage the remarkable capabilities and flexibility of DAX, whether in Microsoft SQL Server Analysis Services, Excel, or Power BI.