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

Simplifying Date Intelligence with DAX and Calculated Tables

In addition to the M query transformations described earlier in this chapter, DAX table functions can also be used in Power BI Import mode models to enhance and simplify date intelligence. DAX queries can access existing tables in the data model, and the tables evaluated during refresh can be used in relationships and measure calculations like all other tables. Similar to calculated columns, calculated tables should be rarely used—given the transformation capabilities of M, SQL, and ETL tools—but can be valuable supplements to models for small tables, such as role-playing date dimensions and bridge tables.

This recipe provides an example of using DAX calculated tables to support role-playing date dimensions. Additionally, a single row table is created via DAX to simplify common date intelligence measures.

Getting ready

To prepare for this recipe, follow these steps:

  1. Open Power BI Desktop...