COALESCE

Returns the first expression that does not evaluate to BLANK. If all expressions evaluate to BLANK, BLANK is returned.

Syntax

COALESCE(<expression>, <expression>[, <expression>]…)


Parameters

Term Definition
expression Any DAX expression that returns a scalar expression.

Return value

A scalar value coming from one of the expressions or BLANK if all expressions evaluate to BLANK.

Remarks

Input expressions may be of different data types.

Example 1

The following DAX query:

EVALUATE { COALESCE(BLANK(), 10, DATE(2008, 3, 3)) }


Returns 10, which is the first expression that does not evaluate to BLANK.

Example 2

The following DAX expression:

= COALESCE(SUM(FactInternetSales[SalesAmount]), 0)


Returns the sum of all values in the SalesAmount column in the FactInternetSales table, or 0. This can be used to convert BLANK values of total sales to 0.