DAX ISBLANK Function

The ISBLANK function in Power BI's Data Analysis Expressions (DAX) language checks whether a value is blank or not. It returns TRUE if the value is blank, and FALSE otherwise.

Syntax:

ISBLANK(<value>)

<value>: This is the value you want to check for blankness.

Example:

Let's say you have a table named Sales with a column named SalesAmount that contains sales data, and you want to check if each value in this column is blank or not. Here's an example:

To use the ISBLANK function in Power BI's DAX to check if each value in the SalesAmount column is blank, you would create a calculated column with the following expression:

IsBlankSales = ISBLANK(Sales[SalesAmount])

This will create a new column IsBlankSales, which will contain TRUE for rows where the SalesAmount is blank (like rows 2 and 4 in the example data) and FALSE for rows where it is not blank.

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