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

Dynamic labels

Consider the following challenge. Your Power BI report contains a column chart with sales by city. The users of your report want to have the option to select other labels for this chart, allowing them to view sales by, say, retail type or product group. Since you have already provided them with some slicers to select the measure used in the visual, you want to use a slicer to select the chart label as well.

As this book is about DAX, we solve this problem with DAX. There are other options in Power BI: you could use bookmarks to show different charts, or allow the report user to select other fields from the model with personalized visuals. All options have pros and cons, like ease of use, the need to change DAX code, and the possibility of using a slicer or other report element to make the selection. We do not elaborate on the other options here.

In this section, a helper table and custom DAX measures are used to solve this challenge.

Solution...