SELECT
 t.NAME AS TableName,
 s.Name AS SchemaName,
 p.rows AS RowCounts,
 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
 t.NAME NOT LIKE 'dt%'
 AND t.is_ms_shipped = 0
 AND i.OBJECT_ID > 255
GROUP BY
 t.Name, s.Name, p.Rows
ORDER BY
 TotalSpaceMB DESC, UsedSpaceMB DESC;