The current version of DAX has a limitation for names you can provide to variables in a DAX expression: a variable name cannot be the name of a table in the data model. This is not a big issue if…  Read more

We are approaching the end of 2018, so it is a good time to review what happened in the DAX world this year, what we’ve been up to at SQLBI and what is going to happen in 2019. New DAX…  Read more

This article describes how DAX automatically converts data types in arithmetic operations. These small details can cause and explain differences in results when using the same operations in other languages.  Read more

This article shows how to improve line charts with a date-based X-Axis in Power BI using DAX, and how to make correct choices in the data modeling and visualization properties.  Read more

This article describes how variables should be used in DAX expressions involving IF and SWITCH statements in order to improve performance.  Read more

This article describes how to create a measure displaying the name or value of an element that has a specific ranking, with different option for managing ties.  Read more

If you have read the book Alberto and I wrote, “The Definitive Guide to DAX” then by looking at the title you might think that this post is about the book. Not this time. I am talking about the new…  Read more

This article describes possible optimization approaches to improve the performance of nested iterators in DAX.  Read more

DAX Studio connects to a Power BI Desktop model using a technique that was not officially supported until a few months ago. This changed when the “diagnostic port” was documented in this article of the official documentation:  Read more

DAX supports dates starting in 1900 and while teaching DAX I always explain that DAX manages dates like Excel, which is the reason why these limitations exist. Actually, this is true – but answering to a comment today I realized…  Read more