A recurring issue for Power BI users writing DAX code is that column filter removal might have an unexpected behavior when the Sort by Column is active on the column. I covered this topic in an article related to RANKX,…  Read more

If you import more than one table into Power BI or Power Pivot, you have a data model. When you have more than one table, you usually have relationships between tables. When you analyze data, you often have many choices…  Read more

We are approaching the end of 2017, 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 2018. New DAX…  Read more

During a conversation at PASS Summit, one of the developers of Power BI shown me a way to use TREATAS in place of IN in DAX. I am not sure it increases readability of the code, but let’s examine pros…  Read more

I recently stumbled across a strange behavior of HASONEVALUE, which also impacts the SELECTEDVALUE function. When the only selected item in a column is a numeric value 0 and the column also contains a blank value, there is a bug…  Read more

PASS Summit is the largest conference about the Microsoft Data Platform technology. Started as a Professional Association for SQL Server community, now the PASS brand includes the many technologies included in the Microsoft Data Platform. It is a large and…  Read more

Professional BI developers using Analysis Services and advanced users working with Power BI share a common pain. Their productivity editing a large data model is much lower than what you might expect in 2017. There are many reasons for that.…  Read more

I have a long experience in working on reporting systems based on semantic models. Now we call them “self-service BI”, but the principles are the same we had in DSS (decision support system), OLAP (on-line analytical processing), and many other…  Read more

Recently Microsoft unified the Data Gateway so that you have a single gateway for Power BI, Azure Analysis Services, Power App, Flow and maybe much else. However, it seems that automatic updates are not even planned at the moment as…  Read more

A few months ago, I and Alberto realized that the reason why variables are not used in DAX as they should is that… there are not many examples out there! For this reason, we made a commitment to use them more…  Read more