DISTINCTCOUNT DAX Function (Aggregation)

Counts the number of distinct values in a column.

Syntax

DISTINCTCOUNT ( <ColumnName> )
Parameter Attributes Description
ColumnName

The column for which the distinct values are counted.

Return values

Scalar A single integer value.

The number of distinct values in ColumnName.

Remarks

The only argument allowed to this function is a column. You can use columns containing any type of data. When the function finds no rows to count, it returns a BLANK, otherwise it returns the count of distinct values.

Related articles

Learn more about DISTINCTCOUNT in the following articles:

  • Related Distinct Count

    The Related Distinct Count pattern allows you to apply the distinct count calculation to any column in any table in the data model. Instead of just counting the number of distinct count values in the entire table using only the DISTINCTCOUNT function, the pattern filters only those values related to events filtered in another table. » Read more

  • Analyzing the performance of DISTINCTCOUNT in DAX

    This article describes how to analyze the performance of a DAX measure based on a DISTINCTCOUNT calculation and how to evaluate possible optimizations. » Read more

Related functions

Other related functions are:

Last update: Nov 21, 2020   » Contribute   » Show contributors

Contributors: Alberto Ferrari, Marco Russo

MSDN documentation: https://docs.microsoft.com/en-us/dax/distinctcount-function-dax

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Context Transition

This function performs a Context Transition if called in a Row Context. Click to read more.

Row Context

This expression is executed in a Row Context. Click to read more.

Iterator

Not recommended

The use of this function is not recommended. See Remarks and Related functions for alternatives.

Not recommended

The use of this parameter is not recommended.

Deprecated

This function is deprecated. Jump to the Alternatives section to see the function to use.

Deprecated

This parameter is deprecated and its use is not recommended.

DirectQuery compatibility

Limitations are placed on DAX expressions allowed in measures and calculated columns.
The state below shows the DirectQuery compatibility of the DAX function.

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