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If you do not have a full month with data, comparisons such as year-over-year (YOY) might require particular filters in order to do a like for like comparison in DAX. This article describes how to write DAX expressions comparing equivalent… Read more
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SQLBI offers a new introductory DAX video course called Introducing DAX. This article describes which users will benefit more from this learning experience, and how to enroll in the course. Read more
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This article explains the most common causes of the error, “A circular dependency was detected” in Power BI and Analysis Services. Read more
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This article describes how to use and interpret the information provided by the Power BI Performance Analyzer, finding the bottlenecks in slow reports. Read more
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This article shows how to use calculation groups to define a default set of values for columns in your model. Different users can have different default values, and yet retain the full capability to select different values. Read more
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A Date table in Power BI can have a smaller number of columns by leveraging custom format strings to adequately control the chart visualization and the sort order. Read more
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Power BI introduced dynamic format strings in May 2023. In this article, we briefly introduce this functionality and then dive into a few technical details of its implementation. Read more
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This article explains a typical pattern to optimize a SUMX iterator by reducing the number of callbacks in the expression. Read more
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This article describes how to optimize time intelligence calculations with DirectQuery over SQL in Power BI by avoiding time intelligence DAX functions. Read more
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In many workshops and sessions about PowerPivot the most frequently asked question has always been: how can I automate the PowerPivot Data Refresh in Excel? I talked about that a few weeks ago. Read more