Two years ago I and Alberto Ferrari spent time discussing techniques to calculate new and returning customers, and we wrote the result of our study in the New and Returning Customer article in DAX Patterns web site and book . During one of the Mastering  Read more

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

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

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

David DeWitt and Rimma Nehme delivered the day 2 keynote at PASS Summit 2015 talking about Internet of Things. Many PASS attendees know David for providing some of the best keynotes every, technical and without vaporware and marketing stuffs. So this  Read more

I’m sitting at the bloggers table at the Day 1 keynote of PASS Summit 2015 and I try to recap the important news for the BI community. SQL Server Analysis Services 2016 CTP 3 will be available in a few days here , but Microsoft already announced the news  Read more

I don’t usually blog about news, unless there is a relevant impact on future directions. Last week we have seen a huge number of announcements for Power BI ( Custom Visuals now available to anyone through a gallery online, you can import them in also  Read more

If you use Analysis Services Tabular, you should dedicate a good amount of time in hardware selection. Unfortunately, throwing money in expensive hardware configuration could be a very bad idea, resulting in your 1,500$ desktop running faster than your  Read more