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The Definitive Guide to DAX: Business intelligence with Microsoft Excel, SQL Server Analysis Services, and Power BI by Marco Russo, Alberto Ferrari

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Chapter 10. Advanced evaluation context

We introduced evaluation contexts in Chapter 4, “Understanding evaluation contexts,” and up to now you have learned how to use them to compute simple formulas. The definition of evaluation contexts used so far is incomplete or, rather, an approximation of what evaluation contexts really are. In order to proceed with more intricate calculations and to obtain a full understanding of how DAX evaluates expressions, you need to move to the next level and to thoroughly learn the way evaluation contexts work and how they interact.

In this chapter we are going to uncover all the complexities of evaluation contexts and show many examples of expressions that look wrong at first sight, but only because you do not ...

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