Hierarchies can be defined in a business/report cube to allow users to drill report data down to particular dimensions in JReport Web.
To define a data hierarchy:
to add them to the hierarchy. Click
to add all the existing categories as hierarchies of the business/report cube. To remove a dimension from a hierarchy, first select it and then click
or the Delete button.To adjust the order of the added hierarchies, click the Mover Up or Move Down button.
To delete a hierarchy, select it in the Hierarchy box and then click the Delete button or
. If you want to remove all the hierarchies in the business/report cube, simply click 
Note: When you add dimensions to a hierarchy, make sure that the chosen dimensions have a logical relationship with each other so that the group hierarchy can be set up correctly.