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

Section 2: Data Preparation in Query Editor

In this section, you will learn how to prepare efficient data models in Query Editor. This chapter is all about transitioning from theory to reality. This chapter explains one of the most important aspects of data modeling, which is data preparation. Not everyone has the luxury of having a pre-built data warehouse; therefore, it is important to know how to build dimensions and facts in Query Editor. Power BI leverages the power of Power Query in Query Editor, so this chapter quickly introduces the Power Query language from a data modeling perspective then explains how to make all components needed in the star schema available to then be used in the data model layer in Power BI. We explain different techniques in data modeling along with real-world hands-on scenarios.  We also discuss common pitfalls that can easily turn building a simple report into a nightmare and ways to avoid falling into those traps.

This section comprises...