You're reading from Expert Data Modeling with Power BI, Second Edition Enrich and optimize your data models to get the best out of Power BI for reporting and business needs

Product type Paperback

Published in Apr 2023

Publisher Packt

ISBN-13 9781803246246

Length 698 pages

Edition 2nd Edition

Languages

DAX

Tools

Power BI

Concepts

Business Intelligence

Author (1):

Soheil Bakhshi

View More author details

Table of Contents (22) Chapters

Preface

1. Section I: Data Modeling in Power BI

2. Introduction to Data Modeling in Power BI FREE CHAPTER

3. Data Analysis eXpressions and Data Modeling

4. Section II: Data Preparation in Query Editor

5. Data Preparation in Power Query Editor

6. Getting Data from Various Sources

7. Common Data Preparation Steps

8. Star Schema Preparation in Power Query Editor

9. Data Preparation Common Best Practices

10. Section III: Data Modeling

11. Data Modeling Components

12. Star Schema and Data Modeling Common Best Practices

13. Section IV: Advanced Data Modeling

14. Advanced Data Modeling Techniques

15. Row-Level and Object-Level Security

16. Dealing with More Advanced Data Warehousing Concepts in Power BI

17. Introduction to Dataflows

18. DirectQuery Connections to Power BI Datasets and Analysis Services in Composite Models

19. New Options, Features, and DAX Functions

20. Other Books You May Enjoy

21. Index

Dealing with degenerate dimensions

The term “degenerate dimension” was coined by the amazing Ralph Kimball. Learn more about the Kimbal Group here: https://www.kimballgroup.com/.

The Kimball Group refers to Webster to define the meaning of the term “degenerate” as follows:

According to Webster, “degenerate” refers to something that’s 1) declined from the standard norm, or 2) is mathematically simpler.

Read the full article here: https://www.kimballgroup.com/2003/06/design-tip-46-another-look-at-degenerate-dimensions/.

From a Star Schema standpoint, degenerate dimensions are the dimension key attributes appearing in the fact tables without having their own dimension. In other words, we do not create a separate dimension table for them. But as we know, from a Star Schema perspective, it is not a good practice to put dimension attributes in the fact tables. So a degenerate dimension, according to Webster’...