Determining space used for each table in a SQL Server SELECT t.NAME AS TableName, s.Name AS SchemaName, p.rows AS RowCounts, SUM (a.total_pages) * 8 AS TotalSpaceKB, SUM (a.used_pages) * 8 AS UsedSpaceKB, ( SUM (a.total_pages) - SUM (a.used_pages)) * 8 AS UnusedSpaceKB 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 t.Name