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Extreme DAX

Extreme DAX

By : Michiel Rozema, Henk Vlootman
4.9 (44)
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Extreme DAX

Extreme DAX

4.9 (44)
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)
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Free Chapter
1
Part I: Introduction
6
Part II: Business cases
15
Other Books You May Enjoy
16
Index

Data modeling for status-oriented data

First, a discussion is needed on different ways to model data for which status is the determining factor. In the real world, how data is modeled is typically a trade-off between what is best for the Power BI model and what is achievable from a data preparation point of view. Here, we focus on what would be best for the model; if you apply this for your organization, you may find that data preparation efforts weigh in more heavily.

In deciding what the facts in the model will be, you have two basic options:

  1. Store the status for each unit of time, usually each day.
  2. Store the changes in the status.

The first option may seem the most straightforward. We just store one data point per day, per product:

Figure 2.7.1: Storing the status of inventory

There are, however, a number of issues with this option that you need to take care of if you choose to model this way:

  • Most source systems store inventory...

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