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)
1
Section 1: Data Modeling in Power BI
4
Section 2: Data Preparation in Query Editor
10
Section 3: Data Modeling
13
Section 4: Advanced Data Modeling

Time intelligence and data modeling

Time intelligence is one of the most powerful and commonly used functionalities in Power BI. For those coming from a SQL development background, it will be pretty clear how hard it is to build time intelligence analysis in a relational database system such as SQL Server. These complex calculations are made easy in Power BI by just a handful of time intelligence functions. This section briefly looks at the common challenges of working with time intelligence functions in Power BI.

Note

Our aim in this book is not to teach you how to use DAX functions; we just cover some more relevant data modeling concepts.

There are currently 35 time intelligence functions available in Power BI. You can find the complete list of functions on the Microsoft website: https://docs.microsoft.com/en-us/dax/time-intelligence-functions-dax.

Detecting valid dates in the date dimension

When dealing with periodic calculations in time intelligence, it is often...