Jeffrey Wang wrote a great blog post about attribute overwriting in MDX that is very clear and full of helpful pictures to show what happens when you write an MDX statement that writes into your multidimensional space. This is very common in an MDX Script  Read more

During the PowerPivot Workshop in London we received many interesting questions and Alberto had the inspiration to write this nice post about Slowly Changing Dimensions handling in PowerPivot. It is interesting the consideration about SCD Type I attributes  Read more

In the comments of a recent post from Alberto Ferrari there was an interesting note about different performance related to the order of conditions in a FILTER call. I investigated about that and Jeffrey Wang has been so nice to give me some info about  Read more

One week ago Alberto Ferrari wrote a post about how to do working days calculation in PowerPivot . You might think this is necessary only for accounting department or something like that… but in reality the same techniques are really useful to implement  Read more

Whenever you have to calculate the distance between two dates, you can simply subtract two dates and DAX in PowerPivot will give you the answer. However, in case you want to calculate the difference in terms of working days you have to instruct your data  Read more

Jeffrey Wang wrote a new post about DAX Time Intelligence functions. This is an “under the cover” description that explains the rationale behind these functions, which need to be used following particular guidelines (described at the beginning of the  Read more

One week ago I described the PowerPivot Workshop Roadshow that we are planning in several European countries. The news today is that the Workshop will be in Frankfurt (Germany) on February 21-22, 2011 ! The registrations are open on www.powerpivotworkshop.com  Read more

Alberto Ferrari wrote an interesting post about a “different approach” in creating a ranking measure with PowerPivot . If you know DAX or you read our book , you will find that a DAX expression can solve the issue. However, such a formula is more complex  Read more

After the successful first edition in Amsterdam of the PowerPivot Workshop in December, we are planning to repeat this 2-day intensive course on PowerPivot in several other European countries (we are also evaluating one or two possible dates in US – please  Read more

If you have not been at Microsoft Business Intelligence Conference this year, which was co-located with TechEd 2010, you probably missed the sessions I and Alberto made there. Well, now you can watch them online on Microsoft TechEd Online site: DAX Patterns  Read more