FIRSTNONBLANK
Applies to: 
Calculated column
Calculated table
Measure 
Visual calculation
Note
This function is discouraged for use in visual calculations as it likely returns meaningless results.
Returns the first value in the column, column, filtered by the current context, where the expression is not blank.
Syntax
FIRSTNONBLANK(<column>,<expression>)
Parameters
| Term | Definition |
|---|---|
| column | A column expression. |
| expression | An expression evaluated for blanks for each value of column. |
Return value
A table containing a single column and single row with the computed first value.
Remarks
The column argument can be any of the following:
- A reference to any column.
- A table with a single column.
A Boolean expression that defines a single-column table .
Constraints on Boolean expressions are described in the topic, CALCULATE function.
This function is typically used to return the first value of a column for which the expression is not blank. For example, you could get the last value for which there were sales of a product.
This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.