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  • Create static tables in Power BI, Power Pivot, and Analysis Services #powerbi #powerpivot #ssas #tabular

    I recently wrote an article about how to Create Static Tables in DAX Using the DATATABLE Function. Such a new DAX feature (the DATATABLE function) will be likely used in the upcoming Analysis Services Tabular 2016, but it is not used neither in Power BI nor in Power Pivot to create static table. For this reason, I think that it could be useful to ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on January 26, 2016
  • The State of Power BI #powerbi

    The 2015 has been an amazing year for Power BI. One year ago, I was commenting on this blog the public preview of Power BI dashboards. A few days ago, Microsoft released the December update of Power BI Desktop and several updates of the Power BI service. In one year, we moved from a situation where Microsoft seemed (and actually was) too slow in ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on December 21, 2015
  • Fix performance issue of pivot tables with Tabular models

    If you use SSAS Tabular, this is a very important news! Microsoft released a very important update for Analysis Services 2012 that provides performance improvements to pivot tables connected to an Analysis Services Tabular model: it is SQL Server 2012 SP2 Cumulative Update 8. Microsoft discussed some of these improvements in this blog post: ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on September 22, 2015
  • Large Dimensions in SSAS Tabular #ssas #vertipaq

    After many years of helping several companies around the world creating small and large data models using SQL Server Analysis Services Tabular, I’ve seen a common performance issue that is underestimated at design time. The VertiPaq engine in SSAS Tabular is amazingly fast, you can have billion of rows in a table and query performance are ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on August 20, 2015
  • The ALLSELECTED function under the cover #dax #tabular #powerpivot #powerbi

    I and Alberto Ferrari recently completed the writing of The Definitive Guide to DAX, and we spent months to correctly describe the internals of evaluation context in this language. There are many details that make data model working with both DAX and MDX, and sometime there are behaviors that are not intuitive to understand. A function that seems ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on August 5, 2015
  • VertiPaq Analyzer for Analysis Services #ssas #tabular #powerpivot #powerbi

    During the writing of The Definitive Guide to DAX I wanted a simple way to analyze the content and distribution of data compressed in the VertiPaq engine, used by Analysis Services Tabular, Power Pivot and Power BI models. I always relied on BISM Memory Report (thanks Kasper!), but when you focus on a single database there are a number of details ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on July 28, 2015
  • Optimize Heap Memory Settings for Analysis Services Tabular 2012/2014 #ssas #tabular

    In the last months I assisted many companies implementing solutions based on Analysis Services Tabular. There is not so much difference between the versions 2012 and 2014, because SQL Server 2014 didn’t introduce new features to the BI services. Thus, my considerations are valid for both. One issue observed in different cases was a general ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on June 2, 2015
  • 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
  • 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
  • White Paper on Analysis Services Tabular Large-scale Solution #ssas #tabular

    Since the first beta of Analysis Services 2012, I worked with many companies designing and implementing solutions based on Analysis Services Tabular. I am glad that Microsoft published a white paper about a case-study using one of these scenarios: An Analysis Services Case Study: Using Tabular Models in a Large-scale Commercial Solution. Alberto ...
    Posted to SQLBI - Marco Russo (Weblog) by sqlbi on June 5, 2014
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