(Select [Dimension Value Code] from [Dimension Set Entry] where [Dimension Set ID] = [Sales Invoice Header].[Dimension Set ID] and [Dimension Code] = 'CUSTOMERGROUP') as [Customer Group],
(Select [Dimension Value Code] from [Dimension Set Entry] where [Dimension Set ID] = [Sales Invoice Header].[Dimension Set ID] and [Dimension Code] = 'DEPARTMENT') as [Department]
From [Sales Invoice Header]