Topic: DAX
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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 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
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The June 2019 update of Power BI includes the ability to filter slicer items based on a measure. This article explains why this is an important feature that should replace bidirectional filters used for the same purpose. Read more
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PowerPivot and BISM Tabular handle relationships between tables by using a single column that requires to be a unique column in the lookup table. In this article you will see how to handle relationships between tables that have different granularities,… Read more
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Hierarchy handling in DAX is not very easy, due to the fact that hierarchies, unlike it was in MDX, are not first-class citizens in the DAX world. While hierarchies can be easily defined in the data model, there are no… Read more