Book Image

Extreme DAX

By : Michiel Rozema, Henk Vlootman
Book Image

Extreme DAX

By: Michiel Rozema, Henk Vlootman

Overview of this book

This book helps business analysts generate powerful and sophisticated analyses from their data using DAX and get the most out of Microsoft Business Intelligence tools. Extreme DAX will first teach you the principles of business intelligence, good model design, and how DAX fits into it all. Then, you’ll launch into detailed examples of DAX in real-world business scenarios such as inventory calculations, forecasting, intercompany business, and data security. At each step, senior DAX experts will walk you through the subtleties involved in working with Power BI models and common mistakes to look out for as you build advanced data aggregations. You’ll deepen your understanding of DAX functions, filters, and measures, and how and when they can be used to derive effective insights. You’ll also be provided with PBIX files for each chapter, so that you can follow along and explore in your own time.
Table of Contents (17 chapters)
Free Chapter
1
Part I: Introduction
6
Part II: Business cases
15
Other Books You May Enjoy
16
Index

Combining dynamic labels and dynamic calculations

If you want to combine the dynamic labels and the dynamic calculations in one visual, you need to use a logical combination of the DAX logic we have seen so far. We can still use SWITCH to determine selections made by the user, but keep in mind that the number of options grows fast. In our case, we have three helper tables, each with three options, meaning 3 x 3 x 3 = 27 options inside the SWITCH function. That is a lot of DAX code to write! Here are examples of the results:

Figure 2.2.11: Sales by countries and order date

Figure 2.2.12: 12-month rolling sales by retail type and delivery date

It would be too much to include all this code on these pages. Instead, you can find the code in the model for this chapter. For now, let us take a look at some parts of the calculation. Below is the start of the DAX formula with three variable declarations to capture the choices of the user:

DynHelperSales3 = 
    VAR...