In the last two weeks we published two new patterns of www.daxpatterns.com : Static Segmentation Dynamic Segmentation These two patterns offers solutions to the general problem of classifying an item by the value of a measure or of a column in your Power  Read more

A few days ago I published the article FILTER vs CALCULATETABLE: optimization using cardinality estimation , where I try to explain why the sentence “CALCULATETABLE is better than FILTER” is not always true. In reality, CALCULATETABLE internally might  Read more

Apparently you cannot pass an argument to a DAX measure. In reality, you can interact with a slicer that has the only purpose of representing a parameter used by a DAX formula. You just create a table in the Power Pivot or Tabular data model, without  Read more

Many people requested me how to connect to Power Pivot from an external program, without publishing the workbook on SharePoint or on Analysis Services Tabular. I always said it is not possible (for both technical and licensing reasons), but someone observed  Read more

Creating Distinct Count calculations in DAX is pretty easy when the target of the operation is a column in the “fact table” of a star schema. When you want to apply the DISTINCTCOUNT function to a dimension attribute (such as Customer Country, Product  Read more

The first pattern published on www.daxpatterns.com is the Cumulative Total . Another common name of this calculation is Running Total, but the reason why we named the pattern in this way is that we identify all those scenarios in which you want to obtain  Read more

I’m very proud to announce the official launch of the DAX Patterns website! http://www.daxpatterns.com I and Alberto Ferrari worked on this idea for a really long time. Many business scenarios can be solved in Power Pivot using always the same models,  Read more

Now that Power BI is finally available (I still use terms as “released” for software and “in production” for a service…) I made some test on the new Scheduled Refresh option that you have for your models (other info here . First of all, the Refresh feature  Read more

Last week I wrote an article about Natural Hierarchies in Power Pivot and Tabular where I show why it is important creating natural hierarchies for performance reasons. I’d like to spend a few words about the reasons why this is so important, so you might  Read more

I had an issue in a query that reminded me a few details naming columns created by ADDCOLUMNS. When you specify a simple name in ADDCOLUMNS, you can use it later, for example in a SUMMARIZE or in a FILTER expression, such as in the following example (see  Read more