Implementing Input Table in DAX Query
Scenario: If you want to pass an input table to a DAX query. For example, you might have an application that lets the user specify a subset of customers and as-of dates for each customer. Your query needs to calculate certain metrics, such as Sales, for the list of customers but as of the user-specified date for each customer, and potentially other parameters. It’s impractical to save these parameters in a physical table in your database because this requires a processing task. You may also want to avoid Analysis Services placing locks on the database for each refresh and thus blocking pending queries. Instead, you want to simply pass a collection of all the parameters the query needs to do its job, inside the query.