This article shows a DAX technique to compute the number of working days between two dates.  Read more

This article shows how to compute a running total over a dimension, like for example the date.  Read more

Microsoft announced at SqlBits a very important feature for DAX: Calculation Groups. These are my first impression about the new feature and the impact it will have on Analysis Services and Power BI.  Read more

This article describes how to write DAX measures that compute aggregations or comparisons with past dates without showing or comparing future dates.  Read more

Yesterday I answered to a question related to parameters in DAX that could be useful to other readers who use DAX in Reporting Services (SSRS): how to manage missing parameters of a DAX query? I wrote an article in the…  Read more

This article describes the real meaning of and the required action for a few common error messages that can appear when users define DAX expressions in Power BI.  Read more

There is an existing limitation in the current version of DAX, regarding what names you 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…  Read more

Data lineage is such a well-implemented DAX feature that most developers use it without knowing about it. This article describes data lineage and how it can help in producing better DAX code.  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

Activating bidirectional cross-filter in a Tabular data model might create ambiguous paths in the chain of relationships, resulting in very dangerous models as numbers become unpredictable. This article provides a deep explanation of the kind of ambiguity that might appear…  Read more