By answering to a student question I realized we often used a wrong calculation of customers age in DAX, and the simple solution is to borrow the same technique used in Excel, using INT and YEARFRAC rather than DATEDIFF or… Read more
This article describes how to optimize DAX expressions with mutually exclusive calculations that might cause slow query performance. Read more
I received a question about how to implement the equivalent of a DISTINCTCOUNTX function in DAX. Well, such a function doesn’t exist in DAX, but imagine you want to write something like: The corresponding measure working in DAX is: In… Read more
When you create a Tabular model for Analysis Services, the Culture and Collation properties are set automatically and cannot be changed by the SSDT user interface in Visual Studio. The biggest issue is the workspace database, because these properties cannot… Read more
The dynamic version of the ABC Classification pattern is an extension of the Dynamic Segmentation pattern It groups items such as Products or Customers into segments based on their cumulated sales and how much they contributed to the total sales… www.sqlbi.com
How can you use Excel and Power BI to gain real insights into your information? As you examine your data, how do you write a formula that provides the numbers you need? The answers to both of these questions lie with the data model. Read more
Marco Russo
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