Topic: Power BI
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In this article we perform a performance comparison between header/detail models and star schemas. Building a star schema might require a few ETL steps and some coding. Nonetheless, it is always the best modeling option. 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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This video shows how to create a like for like comparison in DAX comparing equivalent periods, and how to correctly implement a Boolean condition in a calculated column. Indeed, the presence of BLANK values in a Boolean expression might produce… Watch now
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When you use a measure as a filter in a Power BI visual, the DAX code generated might display different behaviors depending on whether the measure is part of the values shown in the visual or not. In this article,… Read more
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Tabular models (including Power BI) require marking the Date table as a date table to get appropriate results with time intelligence calculations. This article explains why this setting is required. Read more
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ALLEXCEPT is a handy DAX function to retrieve all the columns of a table except for some. When used as a CALCULATE modifier, its behavior is less intuitive and might result in inaccurate measures. In this article, we elaborate on… Read more
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The new video course to create enterprise-level solutions with Power BI and Analysis Services is available! Read more
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Modify the formula of an article answering a reader question: How to compute the last 6 months of transactions using the last transaction date of each customer, using a range of dates that is different for every customer. In the… Watch now
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Discover the pros and cons of disabling attribute hierarchies in Power BI and Analysis Services by modifying the “Available in MDX” property. We will analyze the difference in memory and performance that you can obtain by modifying a Power BI… Watch now
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This article provides you with the technical knowledge to choose between using a Date or an Integer to create the relationship between your fact table and the Date dimension. Read more
