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The new DAX available in Excel 2016 and the data model in Power BI and Analysis Services 2016 offer tools to manage many-to-many relationships in a more efficient way than previous version, as described in this article. Read more
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PowerPivot and Analysis Services 2012 Tabular do not support many-to-many (M2M) relationships directly in the data model. However, you can obtain the desired result from a many-to-many relationship by writing a DAX expression. For example, consider the classic M2M relationship… Read more
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More than one year ago I published a paper about design patterns for many-to-many dimension relationships. Since then, I built other models and I got more experience about possible performance optimizations. Unfortunately, I still hadn’t time to write about it… Read more
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Thanks to a comment sent by a reader of my M2M paper, I just found a possible bug (or “not supported by design feature”) of the CREATE LOCAL CUBE mdx statement. In short, it seems that a simple many-to-many dimension… Read more
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Mastering DAX Video Course
Many-to-many relationships: Bidirectional filtering
…Now if we include this amount M2M into the model, […] so let’s call this Amount M2M,… Watch now
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Optimizing DAX Video Course
Understanding VertiPaq relationships: Limited, many-to-many cardinality relationships
…So 2.513 milliseconds with m2m relationship… Watch now
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blog post
Many-to-Many relationships in PowerPivot
UPDATE: This blog post is still good for learning DAX principles, but a better description of many-to-many patterns is available on The Many-to-Many Revolution whitepaper that is available here: http://www.sqlbi.com/articles/many2many/ – please download it and use the pattern described there to… Read more
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In September 2006 I had announced in this blog the release of the first version of The Many-to-Many Revolution, a whitepaper that describes how to leverage the many-to-many dimension relationships feature that had being available since Analysis Services 2005. The… Read more
