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

What RLS means in data modeling

As mentioned previously, RLS is a mechanism to control user access over data so that the relevant data is accessible only to the relevant user or group of users. This is merely possible by filtering the data based on the users' usernames and the role(s) assigned to them by writing simple Data Analysis Expressions (DAX) or, in more complex scenarios, by making changes in the data model. Therefore, the relationships between tables and the direction of cross-filtering within these relationships are vital.

At the time of writing this book, developing RLS is only possible within Power BI Desktop.

What RLS is not

As mentioned earlier, RLS is simply nothing but filtering data across an entire data model. At the time of writing this book, object-level security (OLS) is made available for public preview. We will look at OLS in more detail in Chapter 12, Extra Options and Features Available for Data Modeling.


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