Definitive Guide to DAX: Business Intelligence for Power BI, SQL Server, and Excel (Business Skills)

This comprehensive guide to Microsoft's DAX language for business intelligence, data modeling, and analytics has been expanded and updated with modern best practices. Authored by expert Microsoft BI consultants Marco Russo and Alberto Ferrari, this book will help you master everything from table functions to advanced code and model optimization.

You'll gain a deep understanding of what happens under the hood when you run a DAX expression, equipping you with the knowledge to write fast, robust code. This edition focuses on examples you can build and run with the free Power BI Desktop, and helps you maximize the powerful syntax of variables (VAR) in Power BI, Excel, or Analysis Services.

Unlock the remarkable capabilities of DAX with this in-depth exploration. You'll learn to perform powerful data analysis with DAX for Power BI, SQL Server, and Excel, mastering core concepts such as calculated columns, measures, and calculation groups. Work efficiently with basic and advanced table functions, and develop a strong grasp of evaluation contexts and the CALCULATE and CALCULATETABLE functions.

Delve into time-based calculations, calculation groups and items, and leverage the syntax of variables (VAR) to write more readable, maintainable code. Express diverse and unusual relationships with DAX, including many-to-many relationships and bidirectional filters.

Dive deep into advanced optimization techniques, improving performance in aggregations and optimizing data models for better compression. Measure the performance of your DAX queries using DAX Studio, and learn how to optimize your DAX for maximum efficiency.

Whether you're new to DAX or an experienced user, this comprehensive guide is exactly what you need to leverage the full power of this remarkable language. Expand your expertise, unlock new analytical capabilities, and take your business intelligence to new heights with this invaluable resource.

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