Book Image

Microsoft Power BI Cookbook - Second Edition

By : Greg Deckler, Brett Powell
Book Image

Microsoft Power BI Cookbook - Second Edition

By: Greg Deckler, Brett Powell

Overview of this book

The complete everyday reference guide to Power BI, written by an internationally recognized Power BI expert duo, is back with a new and updated edition. Packed with revised practical recipes, Microsoft Power BI Cookbook, Second Edition, helps you navigate Power BI tools and advanced features. It also demonstrates the use of end-to-end solutions that integrate those features to get the most out of Power BI. With the help of the recipes in this book, you’ll gain advanced design and development insight, practical tips, and guidance on enhancing existing Power BI projects. The updated recipes will equip you with everything you need to know to implement evergreen frameworks that will stay relevant as Power BI updates. You’ll familiarize yourself with Power BI development tools and services by going deep into the data connectivity, transformation, modeling, visualization, and analytical capabilities of Power BI. By the end of this book, you’ll make the most of Power BI’s functional programming languages of DAX and M and deliver powerful solutions to common business intelligence challenges.
Table of Contents (16 chapters)
14
Other Book You May Enjoy
15
Index

Capturing Current User Context

The foundation of dynamic user security and visibility in Power BI is the ability to extract the user principal name (UPN) or login credential of the business user connected to content in the Power BI service. The USERPRINCIPALNAME DAX function retrieves this text value and thus enables filter expressions to be applied to the tables of a model in security roles. In addition to RLS roles, which override and impact all DAX measures of a dataset, the UPN or "current user" text value can be used by DAX measures to retrieve the UPN prefix and suffix, or filter other measures.

In this recipe, DAX measures are added to a data model to dynamically retrieve the UPN as well as the UPN's prefix and suffix. Additional detail on authentication in Power BI and the USERNAME function, an alternative dynamic DAX function that also retrieves the UPN in the Power BI service, is also covered.

Getting ready

To prepare for this recipe, follow these...