I published an article describing how to implement the grouping of sales transactions by age of customer at the moment of the transaction by using PowerPivot or Analysis Services. The same pattern can be used also for any kind of banding operation, this specific case is useful also to recycle the formula that gets the exact age of the customer for ...

I'm so happy that DAX Studio finally supports Excel 2013! As Darren Gosbell described in his blog, this release has a few internal changes that will better support future enhancements. I will port the code to capture the query plan for a query in this new release, but unfortunately it will require some weeks because I'm traveling a lot in these ...

Microsoft released the Workbook Size Optimizer for Excel, the first version of an Excel add-in for Excel 2013 that inspects the data model and suggest possible optimizations. Fundamentally, it tries to apply the best practices descripted in a white paper I mentioned a few weeks ago, removing useless columns and changing granularity to those that ...

During a PowerPivot Workshop course we received an interesting question from a student: “Can I use LASTNONBLANK (and FIRSTNONBLANK) with a column which is not a date column?” The reason is that we introduce LASTNONBLANK in the Advanced Time Intelligence module, because its typical use case is on a date column. However, you can use these functions ...

Microsoft published an interesting article about how to optimize memory consumption of a PowerPivot Data Model in Excel 2013. All these suggestions are also valid for SSAS Tabular. I also wrote an article Checklist for Memory Optimizations in PowerPivot and Tabular Models with a summary of the best practices. The short list of things to ...

Our new book about PowerPivot 2013 is finally available in printed edition, too! The title is Microsoft Excel 2013: Building Data Models with PowerPivot and it is a partial rewriting of the previous book about PowerPivot for Excel 2010. In the previous book we had a target audience that included advanced Excel users and BI developers, because at ...

One month ago I wrote about my sessions at PASS Business Analytics Conference 2013, in Chicago, IL on April 10-12, 2013. If you still have not registered, you can save $200 by using the code BAC228BL and you should hurry up, because there is another discount if you register within March 15, 2013. If you are too lazy to click on the previous post, ...

There is a new whitepaper from Microsoft, Microsoft BI Authentication and Identity Delegation, which describes all the authentication and delegation scenarios with Microsoft BI technologies: Personal BI Scenarios (Excel) Team BI Scenarios (SharePoint) Corporate BI Scenarios (Reporting Services, Analysis Services) Federated BI ...

Rob Collie Ken Puls (thanks Bob!) wrote a very interesting post about the PowerPivot for Excel 2013 licensing. Short recap: PowerPivot for Excel 2013 is only available in a few editions of Excel/Office (more details here) If you want to buy a perpetual license of Excel with PowerPivot, you need to be included in a Volume Licensing program ...

DAX offers a set of Time Intelligence functions that simplify writing DAX expressions such as YTD, YOY and other time-related calculations. However, these functions only works when some assumptions are valid: your periods should be “natural” months and quarter. Some industries, such as retail and manufacturing, are used to accounting periods that ...