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New DAX functions

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DAX is continuously being improved with new functions and functionality to support new features. New functions and updates are included in service, application, and tool updates which in most cases are monthly.

While functions and functionality are being updated all the time, only those updates that have a visible and functional change exposed to users are described in documentation. New functions and updates to existing functions within the past year are shown here.

Important

Not all functions are supported in all versions of Power BI Desktop, Analysis Services, and Power Pivot in Excel. New and updated functions are typically first introduced in Power BI Desktop, and then later in Analysis Services, Power Pivot in Excel, and tools.

New functions

Function Month Description
FIRST January, 2024 Used in visual calculations only. Retrieves a value in the visual matrix from the first row of an axis.
LAST January, 2024 Used in visual calculations only. Retrieves a value in the visual matrix from the last row of an axis.
NEXT January, 2024 Used in visual calculations only. Retrieves a value in the next row of an axis in the visual matrix.
PREVIOUS January, 2024 Used in visual calculations only. Retrieves a value in the previous row of an axis in the visual matrix.
MATCHBY May, 2023 Define the columns that are used to to match data and identify the current row, in a window function expression.
RANK April, 2023 Returns the ranking for the current context within the specified partition, sorted by the specified order.
ROWNUMBER April, 2023 Returns the unique ranking for the current context within the specified partition, sorted by the specified order.
LINEST February, 2023 Uses the Least Squares method to calculate a straight line that best fits the given data.
LINESTX February, 2023 Uses the Least Squares method to calculate a straight line that best fits the given data. The data result from expressions evaluated for each row in a table.