Select the Definition Method (Data Mining Wizard)
Use the Select the Definition Method page to select the source for creating the new mining model. Your path through the wizard will be different depending on your selection, because a mining structure that is based on a cube requires different steps to construct than a mining structure that is based on a relational data source.
For More information:Creating a New Mining Structure, Data Mining Wizard (Analysis Services - Data Mining)
Options
From existing relational database or data warehouse
Select to create the mining model from an existing relational database or data warehouse.From existing cube
Select to create the mining model from an existing cube.