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

Summary

In this chapter, you have seen many aspects of securing Power BI models. Row-level security is a versatile feature, mainly because you can use DAX to implement sophisticated security filters.

Careful design is needed when implementing security in Power BI models, mainly due to the possibility of having multiple security roles, and because users may be a member of multiple roles. Not all security roles can effectively be combined in the same model, and security therefore even impacts decisions to split models.

With DAX, you can retrieve a user's identity and use that to determine what data is visible, allowing for highly personalized security settings. You can even navigate an organization's hierarchical structure using DAX PATH functions.

You have also learned that through effective combinations of modeling, DAX, and row-level security, you can achieve other forms of security, like value-level security to secure attributes, and securing aggregation levels...