This article presents different techniques to compute a rownumber column in DAX based on a specific ranking, comparing slow and optimized approaches.  Read more

DAX is super-fast, you can use it to query billions of rows in less than one second. End of marketing, now let’s go back to the real world. If your query is not performing as advertised, it is time to…  Watch now

The DIVIDE function in DAX is usually faster to avoid division-by-zero errors than the simple division operator. However, there are exceptions to this rule, described in this article through a simple performance analysis.  Read more

Analysis Services Tabular can be used in large-scale solutions and SQLBI already helped several companies in the challenging effort of defining a reliable and scalable architecture, designing the right data model and optimizing the queries. One of these stories is…  Read more

Distinct Count calculations in DAX are very fast compared to other engines. But when you have a large number of values, performance might be different depending on the query you write.  Read more

Understanding DAX query plans is a long process. This paper explains how to capture and read a DAX query plan, helping you to find possible optimizations of your DAX queries.  Read more