This chapter looks at how you can use DAX variables to make calculations easier to understand and, in some cases, perform faster. Variables are used to store results from DAX expressions. These variables can be as simple as assigning a hardcoded value or the result of a complex DAX equation.
You can use variables in any type of DAX calculation including calculated columns, measures, and tables. Variables are not strictly typed and can represent any type of object in DAX. Variables automatically assume the type of the object being assigned. You must use a RETURN statement to close a layer ...
