Marco Russo's Blog
View full profileCreating your own Contoso star schema database
When working on the Mastering Tabular video course, we needed a sample database with more data than what we had at our disposal in existing sample databases. We also wanted to be able to control the content so that different… Read more

About waiting time for Power BI Desktop to open
Did you ever experience a long waiting time while opening a Power BI Desktop file? There could be many reasons for that, but if you have calculated columns and/or calculated tables in your model, you should be aware that they… Read more

Side effects of rounding differences in Power BI
It is not common to face rounding differences in Power BI. However, when it happens, users are usually disappointed and surprised. Read more

Dictionary size in Tabular models reported by VertiPaq Analyzer
We recently discussed an issue related to the Dictionary size reported by Bravo for Power BI that, in reality, references the behavior of VertiPaq Analyzer, which relies on data management views (DMV) provided by the underlying Analysis Services engine. Because… Read more

What happened in the DAX world in 2021
The second year of the pandemic is coming to a close and despite the many uncertainties, we are all striving to push forward and look ahead. For sure, it is a good moment to see what happened in the DAX… Read more
Choosing Azure Analysis Services or Power BI Premium for large datasets
Almost 18 months ago I compared Azure Analysis Services and Power BI Premium for large datasets. At that time, Azure Analysis Services was a clear choice, but it is almost time to update that post with a longer article. Because… Read more

Setting the right permissions for users of composite models
When you create and publish a composite model using DirectQuery for Power BI datasets and Analysis Services, you should pay attention to the minimal permissions required to consume data. For example, consider the following scenario: Base is a shared dataset… Read more

Development Tools for Power BI and Analysis Services models – Live Event
Past are days of creating data models with a single monolithic tool provided by Microsoft. The required toolbelt includes multiple tools. Most of them are free and open-source. Watch the recording of the SQLBI live event delivered on Wednesday May… Read more

Common mistakes in big data models – Live Event
Don’t miss the upcoming free SQLBI live event on Friday April 16, 2021! Join Adam Saxton, Alberto Ferrari, Patrick LeBlanc, and Marco Russo to discuss common mistakes in big data models. Proper data modeling will be a hot topic in… Read more
Introducing DAX.do
DAX.do is a new website by SQLBI where you can write and run DAX queries over a sample Contoso database. The goal of DAX.do is purely educational: if you are learning DAX or are merely curious to test a new… Read more