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Expert Data Modeling with Power BI - Second Edition

You're reading from Expert Data Modeling with Power BI - Second Edition

Product type Book

Published in Apr 2023

Publisher Packt

ISBN-13 9781803246246

Pages 698 pages

Edition 2nd Edition

Languages

Concepts

Business Intelligence

Author (1):

Soheil Bakhshi

Table of Contents (22) Chapters

Preface

1. Section I: Data Modeling in Power BI

2. Introduction to Data Modeling in Power BI

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’...

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Authors (1)

Soheil Bakhshi

Soheil Bakhshi is the founder of Data Vizioner and is a sought after BI consultant. Working in data and analytics for more than 20 years, Soheil's experience lies in Microsoft BI, Data Warehousing, and Power BI platform. He possesses MSCE, MCSA certifications and is a Microsoft MVP (Most Valuable Professional). He has a passion for sharing knowledge via his website and speaking at conferences and Power BI community events locally and globally. In following his desire for simplicity and efficiency, he is behind Power BI community tools and commercial products such as Power BI Exporter and Power BI Documenter.

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