DBGrid + Treeview

Newbie question : Are there any existing components that combine the
functionality of DBGrid and Treeview?  What I'm looking for is a DBGrid
that displays Assemblies in a database and allows the user to expand
them to view its contents.  A also need to show columns to display
fields such as cost/price etc of the assembly/components.  Any help
appreciatted.

Regards,

Wayne