SELECT 
	schema_name(o.schema_id) + '.' +  o.name as [Table Name], 
	fg.name as [File Group],
	SUM (p.reserved_page_count) as [reserved_page_count],
	convert(decimal(13,2), SUM (p.reserved_page_count) * 8. / 1024 / 1024) as [reservedpages GB],
	SUM (p.used_page_count) as [used_page_count],
	convert(decimal(13,2), SUM (p.used_page_count) * 8. / 1024 / 1024) as [usedpages GB],
	SUM (
		CASE
			WHEN (p.index_id < 2) THEN (p.in_row_data_page_count + p.lob_used_page_count + p.row_overflow_used_page_count)
			ELSE p.lob_used_page_count + p.row_overflow_used_page_count
		END
		) as pages,
	SUM (
		CASE
			WHEN (p.index_id < 2) THEN p.row_count
			ELSE 0
		END
		) as [rowCount]
FROM sys.dm_db_partition_stats p (nolock)
	join sys.objects as o (nolock)
		on o.object_id = p.object_id
		and o.type = 'U'
	join sys.sysindexes i (nolock)
		on i.id = o.object_id
		and i.indid in (0,1)
	join sys.filegroups fg (nolock)
		on fg.data_space_id = i.groupid
group by o.name, o.schema_id, fg.name
order by [reservedpages GB] desc