You're reading from Mastering Microsoft Power BI – Second Edition - Second Edition

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Published inJun 2022

PublisherPackt

ISBN-139781801811484

Edition2nd Edition

Concepts

Business Intelligence

Authors (2):

Gregory Deckler

Brett Powell

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Relationships

Relationships play a central role in the analytical behavior and performance of the dataset. Based on the filters applied at the report layer and the DAX expressions contained in the measures, relationships determine the set of active rows for each table of the model that must be evaluated. Therefore, it’s critical that dataset designers understand how relationships drive report behavior via cross-filtering and the rules that relationships in Power BI must adhere to, such as uniqueness and non ambiguity, as discussed in the next section.

Uniqueness

Relationships in Power BI data models are always defined between single columns in two separate tables. While Power BI does support direct many-to-many relationships, it is recommended that relationships with a cardinality of many-to-many be avoided because this implies that the related columns both contain duplicate values for the related columns. Relationships based on columns containing duplicate values...

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Mastering Microsoft Power BI – Second Edition - Second Edition

Published in: Jun 2022Publisher: PacktISBN-13: 9781801811484

Authors (2)

Gregory Deckler

Greg Deckler is Vice President of the Microsoft Practice at Fusion Alliance and has been a professional technology systems consultant for over 25 years. Internationally recognized as an expert in Power BI, Greg Deckler is a Microsoft MVP for Data Platform and a superuser within the Power BI community with over 100,000 messages read, more than 11,000 replies, over 2,300 answers, and more than 75 entries in the Quick Measures Gallery. Greg founded the Columbus Azure ML and Power BI User Group (CAMLPUG) and presents at numerous conferences and events, including SQL Saturday, DogFood, and the Dynamic Communities User Group/Power Platform Summit.
Read more about Gregory Deckler

Brett Powell

Brett Powell is the owner of and business intelligence consultant at Frontline Analytics LLC, a data and analytics research and consulting firm and Microsoft Power BI partner. He has worked with Power BI technologies since they were first introduced as the PowerPivot add-in for Excel 2010 and has been a Power BI architect and lead BI consultant for organizations across the retail, manufacturing, and financial services industries. Additionally, Brett has led Boston's Power BI User Group, delivered presentations at technology events such as Power BI World Tour, and maintains the popular Insight Quest Microsoft BI blog.
Read more about Brett Powell

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Relationships

Uniqueness

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