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OracleµÄUNDOTBS01.DBFÎļþÌ«´óµÄ½â¾ö°ì·¨ 
1¡¢.½ûÖ¹undo tablespace×Ô¶¯Ôö³¤ 
alter   database   datafile   'full_path\undotbs01.dbf'   autoextend   off; 
2.-- ´´½¨Ò»¸öеÄС¿Õ¼äµÄundo tablespace 
create undo tablespace undotBS2 datafile 'full_path\UNDOTBS02.DBF'  size 100m; 
                                                                 
-- ÉèÖÃеıí¿Õ¼äΪϵͳundo_tablespace 
alter system set undo_tablespace=undotBS2; 
-- Drop ¾ÉµÄ±í¿Õ¼ä 
drop tablespace undotbs1 including contents; 
--²é¿´ËùÓбí¿Õ¼äµÄÇé¿ö 
select * from dba_tablespaces 
--´´½¨±í¿Õ¼ä 
create tablespace  HRPM0 
    datafile '/oradata/misdb/HRPM0.DBF' size 5m  autoextend   on next  10m maxsize unlimited 
--ɾ³ý±í¿Õ¼ä 
DROP TABLESPACE data01 INCLUDING CONTENTS AND DATAFILES; 
--Ð޸ıí¿Õ¼ä´óС 
     alter database datafile '/path/NADDate05.dbf' resize 100M    
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create user amly identified by 9imly;
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create tablespace ts_amly datafile 'd:\amlyfile\test.dbf' size 100M;
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