oracle查看表空间使用

Select a.Tablespace_Name,
       a.Total || 'M' Total_Space,
       (a.Total - b.Free) || 'M' Used_Space,
       To_Char((a.Total - b.Free) / a.Total * 100, '99.99') || '%' Pct_Free
  From (Select Tablespace_Name, Sum(Bytes) / 1024 / 1024 Total
          From Dba_Data_Files
         Group By tablespace_Name) a,
       (Select Tablespace_Name, Sum(Bytes) / 1024 / 1024 Free
          From Dba_Free_Space
         Group By Tablespace_Name) b
where a.Tablespace_Name = b.Tablespace_Name




加大表空间：
http://blog.csdn.net/xiuhaijuanqiang/article/details/6631746
http://blog.chinaunix.net/uid-10951-id-1762412.html
http://yangtingkun.itpub.net/post/468/526381
http://blog.csdn.net/tan_yixiu/article/details/6765438

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