Please join us online for the next Atlanta MS BI and Power BI Group meeting on Monday, February 1st, at 6:30 PM. Paul Turley (MVP) will show you how to use Power Query to shape and transform data. For more details, visit our group page. Presentation: Preparing, shaping & transforming Power BI source data Date: February 1st, 2021 Time 6:30 – 8:30 PM ET Place:…
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The moment you add a calculation group to your model, Power BI sets DiscourageImplicitMeasures = True on the model. Although this property can trick you to be believe that they are still supported, you can't create implicit measures, such as by dragging a numeric field on the report to summarize that field. That's because implicit measures are created as inline calculations which calculation groups don't…
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I've noticed severe performance degradation after refreshing a Power BI Desktop model with some five million rows. The Power BI Desktop process showed a sustained 50-60 % utilization for minutes in the Windows Task Manager. I did a profiler trace and I saw expensive DAX queries like these: EVALUATE SELECTCOLUMNS(FILTER(VALUES('Sales'[PONumber]),LEN('Sales'[PONumber])<=100),"valueColumn",'Sales'[PONumber]) EVALUATE SELECTCOLUMNS(FILTER(VALUES('Sales'[SalesOrderNumber]),LEN('Sales'[SalesOrderNumber])<=100),"valueColumn",'Sales'[SalesOrderNumber]) EVALUATE SELECTCOLUMNS(FILTER(VALUES('Sales'[InvoiceNumber]),LEN('Sales'[InvoiceNumber])<=100),"valueColumn",'Sales'[InvoiceNumber]) As it turned out, Power BI Desktop autogenerates these queries when…
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Happy New Year! I'm excited to announce the availability of the sixth edition of my Applied Microsoft Power BI book! When the first edition was published in January 2016, it was the first Power BI book at that time and it had less than 300 pages. Since then, I helped many companies adopt or transition to Power BI and taught hundreds of students. It's been…
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