alter database datafile '' resize 20m;
alter tablespace wenchuan rename
datafile '/home/oracle/oradata/orcl10g/wenchuan2.dbf'
to '/home/oracle/wenchuan2.dbf';
alter database rename file '/home/oracle/wenchuan2.dbf'
to '/home/oracle/oradata/orcl10g/wenchuan2.dbf'
drop tablespace wenchuan including contents and datafiles;
offline
mv/cp
alter tablespace
shutdow immediate;
startup mount;
alter database rename '' to '';
alter database open;