Returns the first value in the column, column, filtered by the current context, where the expression is not blank.
|column||A column expression.|
|expression||An expression evaluated for blanks for each value of column.|
A table containing a single column and single row with the computed first value.
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.