Topic: DAX
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This article describes the syntax and the use cases of the DEFINE COLUMN statement in DAX. Read more
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This article shows an optimized DAX technique to display the first N products for each category in Power BI, adding a row that aggregates the value for all the other products. The companion video introduces the scenario and the general… Read more
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This article describes a very common optimization pattern that relies on variables to optimize conditional expressions in DAX. Read more
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The Sort By Column feature in Power BI causes side effects that are important to know when writing a DAX formula. This article explains these side effects and how to write correct DAX code to avoid getting incorrect results. Read more
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This article describes different techniques to retrieve multiple values from a lookup table in DAX, improving code readability and performance. Read more
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In budgeting reports, a common requirement is to show future sales forecast and actual sales volume on the same line chart. This article describes how to achieve this goal using DAX. Read more
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Estimating the cardinality of iterators is an important skill when optimizing DAX code. This article explains how to use this technique, evaluating different ways of computing the number of working days between two dates. Read more
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This article describes how to implement in DAX a logical OR condition between the selection of two slicers of a Power BI report or of a PivotTable in Excel. By default, when relying on more than one slicer they are… Read more
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This article shows how to use calculation groups to change the active relationship in a model in order to let users choose among multiple dates. Read more
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This article describes how to compute previous year values up to a certain date. This is useful in case the data is presenting incomplete months or years. Read more