• Absolute Tabular KPIs

    August 14, 2014 / No Comments »

    An interesting requirement popped up during an Analysis Services class I'm teaching this week. The customer wants to implement a Tabular/PowerPivot KPI that has this pseudo logic: CASE WHEN Actual Below Goal && Below LastYearSales Then Red WHEN Actual Below Goal && Above LastYearSales Then Yellow WHEN Actual >= Goal Then Green END   Although I'm using Tabular, the same calculations will work with Power Pivot. Define a LastYearSales measure using the following formula assuming that the measure for the actual amount will be ResellerSales[SalesAmount] =CALCULATE(SUM(ResellerSales[SalesAmount]), PREVIOUSYEAR('Date'[Date])) Define a measure for the KPI actual value using the formula: =SWITCH(TRUE(), SUM(ResellerSales[SalesAmount])<Sum(SalesQuotas[SalesAmountQuota]) && SUM(ResellerSales[SalesAmount])<[LastYearSales],-1, SUM(ResellerSales[SalesAmount])<Sum(SalesQuotas[SalesAmountQuota]) && SUM(ResellerSales[SalesAmount])>[LastYearSales],0, SUM(ResellerSales[SalesAmount])>=Sum(SalesQuotas[SalesAmountQuota]),1 ) This measure using the DAX Switch function. However, to use it as a searched case expression, we use a trick where first argument returns TRUE and the rest of the conditions are evaluated against this hardcoded Boolean value. The formula normalizes the status...

  • Excel Timeline Slicers

    August 5, 2014 / No Comments »

    In an attempt to improve visualizations of Excel-based dashboards, Excel 2013 introduced a Timeline filter. Specifically designed to visualize dates, the Timeline filter works similarly to regular slicers which were introduced in Excel 2010. Similar to a regular slicer, Timeline connects at the connection level and is capable of filtering multiple reports. It supports also extended selections, such as to select multiple years. However, there are important differences between Timeline and regular slicers which become important when you connect to Multidimensional. The Timeline slicer always generates a subselect clause in the resulting MDX query even if a single value is selected. Because of this, the CurrentMember of the Date dimension is not set and any time calculations that dependent on [Date].[Hierarchy].CurrentMember won't work. By contrast, a regular slicer is more intelligent. If the user selection results in a single value, a WHERE clause is generated and CurrentMember works. If multiple...

  • Applied BI Semantic Model Course Available

    July 19, 2014 / No Comments »

    Due to the popular demand, I'm adding a new 5-day Applied BI Semantic Model training course to our training classes. This course reflects the growing need of BI developers to implement both Tabular and Multidimensional semantic models and acquire the necessary knowledge in a compressed educational format. I'm teaching this class for 30 developers next month alone. Targeting BI developers, this intensive 5-day onsite class is designed to help you become proficient with Analysis Services and acquire the necessary skills to implement Tabular and Multidimensional models. Use the opportunity to ask questions and study best practices that will help you implement scalable and secure organizational models.

  • Power View Can’t Load Power Pivot Models

    July 8, 2014 / 1 Comment »

    Scenario: You have created an SSRS application in SharePoint and specified that the application pool would use a specific domain service account that is designated to SSRS. When you attempt to create a Power View report from a deployed Power Pivot model, you get the following error: An error occurred while loading the model for the item or data source '<path to Excel file>'. Verify that the connection information is correct and that you have permissions to access the data source. Here is the full stack: <detail><ErrorCode xmlns="http://www.microsoft.com/sql/reportingservices">rsCannotRetrieveModel</ErrorCode><HttpStatus xmlns="http://www.microsoft.com/sql/reportingservices">400</HttpStatus><Message xmlns="http://www.microsoft.com/sql/reportingservices">An error occurred while loading the model for the item or data source '<path>'. Verify that the connection information is correct and that you have permissions to access the data source.</Message><HelpLink xmlns="http://www.microsoft.com/sql/reportingservices">http://go.microsoft.com/fwlink/?LinkId=20476&amp;EvtSrc=Microsoft.ReportingServices.Diagnostics.Utilities.ErrorStrings&amp;EvtID=rsCannotRetrieveModel&amp;ProdName=Microsoft%20SQL%20Server%20Reporting%20Services&amp;ProdVer=11.0.5058.0</HelpLink><ProductName xmlns="http://www.microsoft.com/sql/reportingservices">Microsoft SQL Server Reporting Services</ProductName><ProductVersion xmlns="http://www.microsoft.com/sql/reportingservices">11.0.5058.0</ProductVersion><ProductLocaleId xmlns="http://www.microsoft.com/sql/reportingservices">127</ProductLocaleId><OperatingSystem xmlns="http://www.microsoft.com/sql/reportingservices">OsIndependent</OperatingSystem><CountryLocaleId xmlns="http://www.microsoft.com/sql/reportingservices">1033</CountryLocaleId><MoreInformation xmlns="http://www.microsoft.com/sql/reportingservices"><Source>ReportingServicesLibrary</Source><Message msrs:ErrorCode="rsCannotRetrieveModel" msrs:HelpLink="http://go.microsoft.com/fwlink/?LinkId=20476&amp;EvtSrc=Microsoft.ReportingServices.Diagnostics.Utilities.ErrorStrings&amp;EvtID=rsCannotRetrieveModel&amp;ProdName=Microsoft%20SQL%20Server%20Reporting%20Services&amp;ProdVer=11.0.5058.0" xmlns:msrs="http://www.microsoft.com/sql/reportingservices">An error occurred while loading the model for the item or data source '<path>'. Verify that the...

  • Where is Power Pivot for SharePoint?

    June 30, 2014 / No Comments »

    In the process of configuring Power Pivot for SharePoint, you need to run the Power Pivot Configuration Tool, which the documentation explains well here and here. What it doesn't tell you is that unless you overwrite the URL in the Activate PowerPivot Feature in a Site Collection step, Power Pivot will be activated for the first site collection. I ran into a situation where the customer had installed My Sites and Portal site collections and the tool happily defaulted to activating Power Pivot for the My Sites site collection although we expected it to show up in the portal site. Ideally, the tool should support checking multiple site collections but it doesn't – you can specify only one. And if you don't overwrite the URL, it will pick the first site collection it finds. If your SharePoint farm has other collections, you need to manually activate Power Pivot after the...

  • Atlanta MS BI Group Meeting on Jun 30th

    June 30, 2014 / No Comments »

    Join us for our next Atlanta MS BI Group meeting tomorrow, Monday, June 30th, to learn about implementing BI for financial reporting. You'll also get a glimpse of the newly announced Microsoft Azure Machine Learning. Spread the word and invite your coworkers but RSVP on our website so we can plan food accordingly. Main Presentation: Microsoft BI for Financial Reporting   Level: Intermediate Date: Monday, June 30th, 2014 Time 6:30 – 8:30 PM ET Place: South Terraces Building (Auditorium Room) 115 Perimeter Center Place Atlanta, GA 30346 Overview: Using a Finance data mart in SQL Server 2012, I will demo how to use SSAS 2012 and Excel 2013 for Financial Reporting. This will include the basic DW model for Financial Reporting, how to configure the key dimensions in SSAS, how to setup writeback functionality in the Finance Cube with Security, and how to use Excel for the Reporting and writeback...

  • Microsoft Azure Machine Learning

    June 18, 2014 / No Comments »

    Yesterday, Microsoft announced Microsoft Azure Machine Learning, previously known as project Passau. Your humble correspondent has been participating in the Preview Program. Basically, Microsoft Azure Machine Learning is a service for self-service cloud-based predictive analytics. You upload your data to the cloud, define datasets and workflows to create "experiments". Previously, you could create data mining models using the SQL Server data mining capabilities. Microsoft Azure Machine Learning to organizational DM models is what Power Pivot to Analysis Services is. Besides its cloud-based nature, Microsoft Azure Machine Learning offers: Data sources – Allow business users to upload source data as files. Workflows – Business users can drag and drop tasks to create workflows, such as to perform basic data transformation tasks, remove outliers, train, and score mining models. Users will familiar with SSIS will undoubtedly find workflows similar. Users familiar with SAS data mining will do the same. Scalability – You...

  • Optimizing Arbitrary Shaped Sets

    June 17, 2014 / No Comments »

    I'm working on optimizing a fairly large cube (2.5 TB) with some 25 billion rows in the fact table. The customer was complaining about long-running queries. Most queries would specify a time range that was passed to the query filter. For example, if the user wants to see the aggregated data from May 25th 20:00 to June 2nd 19:00, the query WHERE clause would like this: WHERE ( { [Date].[Date].[Date].&[20140527] * [Hour].[Hour].&[20] : [Hour].[Hour].&[23], [Date].[Date].[Date].&[20140528]:[Date].[Date].[Date].&[20140601] * [Hour].[Hour].&[0] : [Hour].[Hour].&[23], [Date].[Date].[Date].&[20140602] * [Hour].[Hour].&[0] : [Hour].[Hour].&[19] } … additional dimension filters here ) This an example of using arbitrary-shaped sets which Mosha wrote about here and Thomas Kejser here. "The resulting union set has interesting shape – it cannot be represented as pure crossjoin of attribute hierarchies. Such sets are nicknamed "arbitrary shaped sets" in Analysis Services, because they represent shapes of arbitrary complexity. Analysis Services in general doesn't like arbitrary shaped...

  • Partition Bug with Visual Studio

    June 10, 2014 / No Comments »

    There is a glaring bug with Multidimensional and Visual Studio 2012 and above. When attempting to add a new partition, the Partition Wizard finishes without error but no partition is added. Interestingly, no one has reported this bug more than two years after these Visual Studio editions have shipped. A couple of workarounds exist: Use SSDT or Visual Studio 2010 to create partitions. You can open your SSAS 2012 project in any Visual Studio edition starting with 2010. Add the partition either programmatically using AMO or by making changes directly to the *.partitions file. On the subject of partitions, note that MS has marked the following features deprecated: Remote partitions Remote linked measure groups Linked Dimensions Dimension writeback These features won't be terribly missed. I haven't seen remote partitions being used in real life except in BI certification exams. Linked measure groups also needs linked dimensions, but again, nobody in...

  • Presenting at SharePoint Saturday Atlanta 2014

    June 3, 2014 / No Comments »

    I'll be presenting "10 Ways to Maximize Your SharePoint BI Investment" at SharePoint Saturday Atlanta 2014 on June 21st. "Join me to learn how to take the most out of your on-prem or cloud SharePoint investment to promote organizational and self-service BI. We'll compare features of SharePoint editions and discuss options to visualize data from corporate databases and analytical models. Business users will learn how to share their self-service BI visualizations with teammates. We'll discuss how Office 365 and Power BI can help you implement a cloud-based environment for ease of sharing, collaboration, and information access." I hope you can make it. You can register here.

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