FIRSTNONBLANK DAX Function (Time Intelligence)  Context Transition

Returns the first value in the column for which the expression has a non blank value.


FIRSTNONBLANK ( <ColumnName>, <Expression> )
Parameter Attributes Description

The source values.

Row Context

The expression to be evaluated for each value.

Return values

Table A table with a single column.

A table containing a single column and single row with the computed first value.


The ColumnName argument can be any of the following:

  • A reference to a column. Only in this case a context transition applies because the column reference is replaced by
  • A table expression that returns a single column.
  • A Boolean expression that defines a single-column.

The result table includes only values that exist in the ColumnName column.
Even though this function is commonly used for dates, it can be applied to a column of any data type.

The ColumnName argument must be a column. In certain conditions the function does not return an error passing a table with more than one column as ColumnName argument, but the behavior in that case is not supported and the error condition is not reported because it could break existing reports.

Related articles

Learn more about FIRSTNONBLANK in the following articles:

  • Alternative use of FIRSTNONBLANK and LASTNONBLANK

    You might have used FIRSTNONBLANK and LASTNONBLANK in semi-additive measures, but you might not be aware that their use is not limited to time intelligence functions. This article shows alternative scenarios where these functions are useful. » Read more

  • Semi-Additive Measures in DAX

    Values such as inventory and balance account, usually calculated from a snapshot table, require the use of semi-additive measures. In Multidimensional you have specific aggregation types, like LastChild and LastNonEmpty. In PowerPivot and Tabular you use DAX, which is flexible enough to implement any calculation, as described in this article. » Read more

Related functions

Other related functions are:

Last update: Jul 1, 2020   » Contribute   » Show contributors

Contributors: Alberto Ferrari, Marco Russo

MSDN documentation:

DAX Conventions
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.


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.


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


This parameter is deprecated and its use is not recommended.


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