DAX is simple, but it is not easy. I cannot remember how many times I read this sentence on social media, attributed to me. For good reason: I have repeated this sentence at almost every classroom course I delivered over…  Read more

This article describes how to use DAX calculated columns to sort names that look like duplicates at a certain level of a hierarchy, but are unique when considering their full path within the hierarchy.  Read more

DAX Studio is the best tool to analyze the performances of DAX queries. In this webinar recorded for powerbi.tips, Marco Russo shows how to collect metrics in DAX Studio and investigate on storage engine and formula engine cost of some…  Watch now

In this article, we share an idea to reduce the friction in using Power BI, by extending the DAX language with new visual calculations.  Read more

Starting from the May 2020 version of Power BI Desktop, regardless of the Windows locale settings DAX always uses standard separators by default. This change does not affect most Power BI users around the world; but if you use the…  Read more

This article shows how to use the USERELATIONSHIP function in DAX to change the active relationship in a CALCULATE function.  Read more

VertiPaq Analyzer is a set of tools and libraries to analyze VertiPaq storage structures for a data model in Power BI and Analysis Services Tabular. In this webinar recorded for powerbi.tips, Marco Russo shows how VertiPaq Analyzer has been integrated…  Watch now

This article explains how to control the result provided by a formula in a DAX measure when the meas-ure is being used in a report with granularity below the granularity supported by the formula.  Read more

This article describes how to compute visual totals accurately, in case a measure does not provide the right result at the total level but works correctly in other rows of the report.  Read more

UPDATE 2020-03-28: Calculation groups are coming soon to Power BI Desktop, read the added section at the bottom of the post. I am glad to announce that we just released an additional module about Calculation Groups to the Mastering DAX…  Read more