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If you try to use SELECTEDVALUE on the visible column of the table generated by the Fields Parameters feature in Power BI, you get the following error: Calculation error in measure ‘Sales'[Selection]: Column [Parameter] is part of composite key, but… Read more
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When working on the Mastering Tabular video course, we needed a sample database with more data than what we had at our disposal in existing sample databases. We also wanted to be able to control the content so that different… Read more
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Did you ever experience a long waiting time while opening a Power BI Desktop file? There could be many reasons for that, but if you have calculated columns and/or calculated tables in your model, you should be aware that they… Read more
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It is not common to face rounding differences in Power BI. However, when it happens, users are usually disappointed and surprised. Read more
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We recently discussed an issue related to the Dictionary size reported by Bravo for Power BI that, in reality, references the behavior of VertiPaq Analyzer, which relies on data management views (DMV) provided by the underlying Analysis Services engine. Because… Read more
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Something really big is happening! The July 2020 version of Power BI Desktop allows you to create calculation groups in Power BI Desktop, thanks to the new “external tools” feature that enables the integration with Tabular Editor. We had been… Read more
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I recently wrote an article that describes how to calculate a measure (such a sales, but it could be anything else) considering for each customer its first 12 months, then months 13-24 and so on. In practice, for every customer you have a different range Read more
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The second year of the pandemic is coming to a close and despite the many uncertainties, we are all striving to push forward and look ahead. For sure, it is a good moment to see what happened in the DAX… Read more
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In DAX, optimizations and data types do not always play nice and can leave you dealing with surprises. In this short article, we see an example of how mixing blanks, Boolean logic, and comparison with TRUE might lead to unexpected… Read more
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UPDATE 2021-06-29: also read Choosing Azure Analysis Services or Power BI Premium for large datasets – SQLBI containing updates about Power BI Premium Gen2. I often get questions about use cases for Azure Analysis Services. So I wanted to do… Read more