MSSQL 查询每个表的占用空间大小

SELECT   
    t.NAME AS TableName,  
    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, p.Rows  
ORDER BY   
    TotalSpaceKB DESC;