表空间管理
(select tablespace_name,sum(bytes) bytes from dba_data_files group by tablespace_name) a,(select tablespace_name,sum(bytes) bytes,max (bytes) largest from dba_free_space group by tablespace_name)bwhere a.tablespace_name=b.tablespace_nameorder by ((a.bytes-b.bytes)/a.bytes) desc;??
