August 2019
Intermediate to advanced
768 pages
26h
English
book
Definitive Guide to DAX, The: Business intelligence for Microsoft Power BI, SQL Server Analysis Services, and Excel, 2nd Edition
by Alberto Ferrari, Marco Russo
Content preview from Definitive Guide to DAX, The: Business intelligence for Microsoft Power BI, SQL Server Analysis Services, and Excel, 2nd Edition
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Chapter 2Introducing DAX
In this chapter, we start talking about the DAX language. Here you learn the syntax of the language, the difference between a calculated column and a measure (also called calculated field, in certain old Excel versions), and the most commonly used functions in DAX.
Because this is an introductory chapter, it does not cover many functions in depth. In later chapters, we explain them in more detail. For now, introducing the functions and starting to look at the DAX language in general are enough. When we reference features of the data model in Power BI, Power Pivot, or Analysis Services, we use the term Tabular even when the feature is not present in all the products. For example, “DirectQuery in Tabular” refers to the ...
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