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  • DAX Studio 2.0 finally available! #dax #ssas #tabular #powerpivot

    Darren Gosbell announced on his blog that DAX Studio 2.0 is available. This new release has a completely new user interface, a renewed architecture and also work as a standalone executable without Excel. Yes, you read it right. You can use DAX Studio on a server without having to run it in Excel. You can now connect with Remote Desktop to your ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on December 8, 2014
  • What are useful tools and resources for DAX developers? #dax #powerpivot #tabular

    At the last PASS Summit I received an interesting question: is there a list of all the useful (I would say necessary…) tools for DAX developers? My answer was… “no, but this is an interesting topic for a blog post”. In the meantime, I thought that a page to keep updated would have been better, and of course an easy-to-remember URL is equally ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on November 20, 2014
  • Don’t use SUMMARIZE to sum your data–or just be careful #dax #ssas #powerpivot

    During the last PASS Summit I and Alberto Ferrari had long discussions at SQL Clinic with some of the developers of our loved tools. Sometime you really have to dig in the internals of certain feature to understand why there are some “unexpected” behaviors for certain functions. One of the discussions was about SUMMARIZE. This function can be very ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on November 18, 2014
  • Power Query support for Analysis Services (MDX)

    Today at TechEd Europe 2014 Miguel Llopis made the first public show of Power Query support for Analysis Services. This is still not available, but it should be released soon (hopefully it will be our Christmas gift!). Here is a list of features shown:It should be able to query both Multidimensional and TabularGenerates query in MDX (no DAX by ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on October 28, 2014
  • A strange behavior of AutoExist for MDX on Tabular models #powerpivot #ssas #tabular

    Alberto Ferrari wrote an interesting article about a strange behavior of AutoExist in normalized data models. I always say that a star schema is the best practice in Power Pivot and Tabular data modeling. The issue described by Alberto is another good reason to avoid snowflake schemas. I think that an example is better than many words. Consider ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on October 21, 2014
  • Simulate the SQL WHERE condition in DAX–#dax #powerpivot #ssas

    I recently wrote a short article about filtering data in DAX. In the last month I’ve seen a growing number of people with a SQL background going to Tabular, without having a previous experience of MDX. In my opinion, learning DAX is easier if you try to match its features to SQL rather than to MDX. The reality is that DAX is somewhere in the ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on September 29, 2014
  • Possible SWITCH Optimization in DAX – #powerpivot #dax #tabular

    In one of the Advanced DAX Workshop I taught this year, I had an interesting discussion about how to optimize a SWITCH statement (which could be frequently used checking a slicer, like in the Parameter Table pattern). Let’s start with the problem. What happen when you have such a statement? Sales :=     SWITCH ( ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on August 18, 2014
  • DIVIDE vs division operator in #dax

    Alberto Ferrari wrote an interesting article about DIVIDE performance in DAX. This new function has been introduced in SQL Server Analysis Services 2012 SP1, so it is available also in Excel 2013 (which still doesn’t have other features/fixes introduced by following Cumulative Updates…). The idea that instead of writing: IF ( Sales[Quantity] ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on July 24, 2014
  • Use of RANKX with decimal numbers in DAX #powerpivot #ssas #tabular

    Using decimal numbers in Power Pivot and Tabular might produce small rounding differences in certain calculations. This is nothing new when you work with floating point, as many programmer knows. The implementation of RANKX might suffer of a behavior producing wrong results when the measures used for the ranking returns a decimal value. For ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on July 16, 2014
  • Basket Analysis with #dax in #powerpivot and #ssas #tabular

    A few days ago I published a new article on DAX Patterns web site describing how to implement Basket Analysis in DAX. This topic is a very classical one and is also covered in the many-to-many revolution white paper. It has been also discussed in several blog posts, listed here in historical order: Simple Basket Analysis in DAX by Chris Webb ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on June 12, 2014
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