테이블별 용량 

SELECT
  t_name = convert(varchar(50), min(o.name)), 
  T_sz = ltrim(str(sum(reserved) * 8192 / 1024 / 1024.,15,0) + 'MB') 
FROM
  sysindexes i inner join sysobjects o on (o.id = i.id) 
WHERE
  i.indid in (0, 1, 255) 
  AND o.xtype = 'U'
GROUP BY i.id 
ORDER BY t_name asc

테이블별 로우수

SELECT
  o.name, i.rows
FROM
  sysindexes i INNER JOIN sysobjects o ON i.id = o.id 
WHERE
  i.indid < 2 
  AND o.xtype = 'U'
ORDER BY o.name