Book Image

Expert Data Modeling with Power BI

By : Soheil Bakhshi
Book Image

Expert Data Modeling with Power BI

By: Soheil Bakhshi

Overview of this book

This book is a comprehensive guide to understanding the ins and outs of data modeling and how to create data models using Power BI confidently. You'll learn how to connect data from multiple sources, understand data, define and manage relationships between data, and shape data models to gain deep and detailed insights about your organization. In this book, you'll explore how to use data modeling and navigation techniques to define relationships and create a data model before defining new metrics and performing custom calculations using modeling features. As you advance through the chapters, the book will demonstrate how to create full-fledged data models, enabling you to create efficient data models and simpler DAX code with new data modeling features. With the help of examples, you'll discover how you can solve business challenges by building optimal data models and changing your existing data models to meet evolving business requirements. Finally, you'll learn how to use some new and advanced modeling features to enhance your data models to carry out a wide variety of complex tasks. By the end of this Power BI book, you'll have gained the skills you need to structure data coming from multiple sources in different ways to create optimized data models that support reporting and data analytics.
Table of Contents (18 chapters)
Section 1: Data Modeling in Power BI
Section 2: Data Preparation in Query Editor
Section 3: Data Modeling
Section 4: Advanced Data Modeling

Common RLS implementation approaches

There are usually two different approaches to implementing RLS in Power BI Desktop: static RLS and dynamic RLS. In the following few sections, we look at both approaches by implementing real-world scenarios.

Implementing static RLS

A static RLS approach is used when we define rules that statically apply filters to the data model—for example, in Figure 11.2, we created a static RLS rule to filter the Internet Sales amounts by currency when the currency equals AUD. Static RLS is simple to implement, but it can get quite expensive to maintain and support. However, in some cases, static RLS is just enough to satisfy the business requirements—for instance, when the data model does not include data to support dynamic RLS, implementing and supporting dynamic RLS can be more expensive than implementing and supporting static RLS. A good example is in an international organization with a few security groups within Azure Active Directory...