SELECT            t.name AS TableName,
                  s.name AS SchemaName,
--                  [i].[name] AS indexName,
                  MAX([p].[rows]) AS [rowCount],
                  SUM([a].[total_pages]) * 8 AS TotalSpaceKB,
                  CAST(ROUND(((SUM([a].[total_pages]) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS TotalSpaceMB,
                  SUM([a].[used_pages]) * 8 AS UsedSpaceKB,
                  CAST(ROUND(((SUM([a].[used_pages]) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS UsedSpaceMB,
                  (SUM([a].[total_pages]) - SUM([a].[used_pages])) * 8 AS UnusedSpaceKB,
                  CAST(ROUND(((SUM([a].[total_pages]) - SUM([a].[used_pages])) * 8) / 1024.00, 2) AS NUMERIC(36, 2)) AS UnusedSpaceMB
  FROM            sys.tables t
 INNER JOIN       sys.indexes i
    ON t.object_id        = i.object_id
 INNER JOIN       sys.partitions p
    ON i.object_id        = p.object_id
   AND i.index_id         = p.index_id
 INNER JOIN       sys.allocation_units a
    ON [p].[partition_id] = [a].[container_id]
  LEFT OUTER JOIN sys.schemas s
    ON t.schema_id        = s.schema_id
 WHERE            i.object_id > 255
   AND            i.index_id IN ( 0, 1 )
   AND            t.name NOT LIKE 'dt%'
   AND            [t].[is_ms_shipped]    = 0
   AND            i.object_id            > 255
 GROUP BY t.name,
          s.name
 ORDER BY [TotalSpaceMB] DESC

RETURN

SELECT      t.name AS TableName,
            MAX([p].[rows]) AS RowCounts,
            (SUM([a].[total_pages]) * 8) / 1024.0 AS TotalSpaceMB,
            (SUM([a].[used_pages]) * 8) / 1024.0 AS UsedSpaceMB,
            (SUM([a].[data_pages]) * 8) / 1024.0 AS DataSpaceMB
  FROM      sys.tables t
 INNER JOIN sys.indexes i
    ON t.object_id        = i.object_id
 INNER JOIN sys.partitions p
    ON i.object_id        = p.object_id
   AND i.index_id         = p.index_id
 INNER JOIN sys.allocation_units a
    ON [p].[partition_id] = [a].[container_id]
 WHERE      i.object_id > 255
   AND      i.index_id IN ( 0, 1 )
 GROUP BY t.name
 ORDER BY TotalSpaceMB DESC;