磁盘空间不足，释放回滚段空间

磁盘空间不足，释放回滚段空间
create undo tablespace undotbs2 datafile '/oracle/app/oracle/oradata/EP1/UNDOTBS02.DBF' size 20m; 
alter system set undo_tablespace=undotbs2 scope=both;
drop tablespace undotbs1 including contents; 

alter database datafile '/oracle/app/oracle/oradata/EP1/UNDOTBS02.DBF' resize 2048m;

rm -rf /oracle/app/oracle/oradata/EP1/UNDOTBS01.DBF  //删除原回滚段文件