If you are using Power BI Desktop or Power Pivot in Excel 2016, you should learn when and how you can use GROUPBY instead of SUMMARIZE. The SUMMARIZE function is very powerful and internally very complex, so it’s easy to find scenarios where you get unexpected  Read more

In a couple of weeks, I will move to Australia for 3 weeks, visiting Melbourne and Sydney for a number of events and training. This is the list of topics in public events you can attend (with link to registration pages – remember that SQL Saturday conferences  Read more

I recently wrote an article about how to Create Static Tables in DAX Using the DATATABLE Function . Such a new DAX feature (the DATATABLE function) will be likely used in the upcoming Analysis Services Tabular 2016, but it is not used neither in Power  Read more

When you use Power Pivot, there are a number of operations requiring more than one click (or much more than just Excel): Creating a pivot table based on the current data model (at least 2 or 3 clicks) Create a table of existing measures (including its  Read more

I have experienced (on difference customer’s databases) some performance issues related to security in SSAS Tabular models. The symptoms are that certain queries, pivot table, or reports, have good performance when you connect as a database administrator,  Read more

This short blog post is a note that could help myself in the future, or anyone who is interested in writing a client tool for Analysis Services. When you establish a session to Analysis Services, you can run both DAX and MDX statements. In DAX, you can  Read more

The 2015 has been an amazing year for Power BI. One year ago, I was commenting on this blog the public preview of Power BI dashboards. A few days ago, Microsoft released the December update of Power BI Desktop and several updates of the Power BI service.  Read more

Last week Amir Netz presented in the Power BI blog a detailed introduction to the Synoptic Panel written by Daniele Perilli. This component won Power BI best visual contest in October, but since then we received many feedback and Daniele worked on it  Read more

While I am teaching Mastering DAX and Optimizing DAX classes, I am always available to speech at local user group events. This week, I will present an updated version of the “Toolkit for DAX Optimization” in Amsterdam, on Thursday, November 26, 2016.  Read more

I recently write a small article on SQLBI to describe how to create a DAX measure that search for items that have all the items selected in a slicer, instead of any of them. For example, you might want to create a measure that display how many customers  Read more