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ALLSELECTED is a powerful, yet dangerous function. This article describes the best practices to follow to avoid falling into the pitfalls involved with ALLSELECTED. Read more
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When should you use DISTINCT over VALUES in DAX? Here is how to write resilient measures that survive bad data and model changes. Read more
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When using time intelligence functions, the automatic REMOVEFILTERS on Date can make maintaining filters on the Date table challenging. This article shows a technique to handle filter-preserving columns in DAX. Read more
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This article describes the DAX context transition using a conceptual model based on a visual representation. Read more
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This article clarifies how DAX evaluates variables, which is important to avoid common mistakes when using DAX for the first time. Read more
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This article describes the DAX filter context using a conceptual model based on a visual representation. Read more
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The context transition in DAX is the transformation of row contexts into an equivalent filter context performed by CALCULATE and CALCULATETABLE. Managing this behavior is the next step in learning DAX once you understand row context and filter context. This… Read more
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DAX creates a blank row to guarantee that results are accurate even if a regular relationship is invalid. The blank row is not created for limited relationships. This article shows the effect of not having a blank row in your… Read more
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Activating bidirectional cross-filter in a Tabular data model might create ambiguous paths in the chain of relationships, resulting in very dangerous models as numbers become unpredictable. This article provides a deep explanation of the kind of ambiguity that might appear… Read more
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This article describes how to apply dynamic security roles in a hierarchical organization to minimize the maintenance effort on the security configuration and obtain the best performance at query time. Read more