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During the writing of The Definitive Guide to DAX I wanted a simple way to analyze the content and distribution of data compressed in the VertiPaq engine, used by Analysis Services Tabular, Power Pivot and Power BI models. I always… Read more
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This article analyzes a classic modeling question: is it better to build a model as a regular star schema or as a single table in Power BI? The answer is clear: a star schema is always the best choice. Read more
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articleOptimizing DAX – second edition
The second edition of the Optimizing DAX video course is available: new content, a new book, and some on the behind-the-scenes of the project. Read more
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During the last months I and Alberto worked in several projects using Analysis Services Tabular and we had to face real world issues, such as complex queries, large data volume, frequent data updates and so on. Sometime we faced the… Read more
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Data modeling in Tabular is different from Multidimensional. I spend much time teaching people that they need to change their mind when approaching the Vertipaq engine, because it is a different tool with different capabilities. Nevertheless, I still have a… Read more
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At the end of June 2012, I was in Amsterdam to present some sessions at Teched Europe 2012 and, while preparing the material for the demos (yes, the best demos are the ones I prepare at the last minute), I… Read more
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Both GROUPBY and SUMMARIZE are useful functions to group by columns. However, they differ in both performance and functionalities. Knowing the details lets developers choose the right function for their specific scenario. Read more
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This article describes how to optimize time intelligence calculations with DirectQuery over SQL in Power BI by avoiding time intelligence DAX functions. Read more
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This article contains a short checklist of what you have to do in order to optimize the memory used by a data model in PowerPivot or in Analysis Services Tabular, including links to tools and resources that can help you… Read more
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This page contains descriptions and links to necessary tools and resources for DAX and Tabular developers. Read more