有一个表空间数据文件所在的磁盘使用率达到100%，将文件改到新的路径下，方法如下：
[root@oracle9ivm ~]# su - oracle
[oracle@oracle9ivm ~]$ sqlplus /nolog

SQL*Plus: Release 9.2.0.4.0 - Production on Sat Jun 12 19:23:32 2010

Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.

SQL> conn / as sysdba
Connected.
SQL> select file#,status,name from v$datafile;

     FILE# STATUS  NAME
---------- ------- -----------------------------------
         1 SYSTEM  /u01/oradata/ora10g/system01.dbf
         2 ONLINE  /u01/oradata/ora10g/undotbs01.dbf
         3 ONLINE  /u01/oradata/ora10g/cwmlite01.dbf
         4 ONLINE  /u01/oradata/ora10g/drsys01.dbf
         5 ONLINE  /u01/oradata/ora10g/example01.dbf
         6 ONLINE  /u01/oradata/ora10g/indx01.dbf
         7 ONLINE  /u01/oradata/ora10g/odm01.dbf
         8 ONLINE  /u01/oradata/ora10g/tools01.dbf
         9 ONLINE  /u01/oradata/ora10g/users01.dbf
        10 ONLINE  /u01/oradata/ora10g/xdb01.dbf
        11 ONLINE  /u01/oradata/ora10g/testtbs01.dbf

     FILE# STATUS  NAME
---------- ------- -----------------------------------
        12 ONLINE  /u01/oradata/ora10g/app01.dbf
        13 ONLINE  /u01/oradata/app02.dbf

13 rows selected.

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

--将文件移动到新的目录
[root@oracle9ivm ora10g]# ll
total 3015032
-rw-r-----  1 oracle oinstall   10493952 Jun 12 19:16 app01.dbf
-rw-r-----  1 oracle oinstall   10493952 Jun 12 19:07 app02.dbf
drwxr-xr-x  2 oracle oinstall       4096 Jun  6 16:34 arch
-rw-r-----  1 oracle oinstall    2039808 Jun 12 19:23 control01.ctl
-rw-r-----  1 oracle oinstall    2039808 Jun 12 19:23 control02.ctl
-rw-r-----  1 oracle oinstall    2039808 Jun 12 19:23 control03.ctl
-rw-r--r--  1 oracle oinstall   20979712 Jun 12 19:16 cwmlite01.dbf
-rw-r--r--  1 oracle oinstall   20979712 Jun 12 19:16 drsys01.dbf
-rw-r--r--  1 oracle oinstall  156639232 Jun 12 19:16 example01.dbf
-rw-r--r--  1 oracle oinstall   26222592 Jun 12 19:16 indx01.dbf
-rw-r--r--  1 oracle oinstall   20979712 Jun 12 19:16 odm01.dbf
-rw-r-----  1 oracle oinstall  104858112 Jun 12 19:16 redo01.log
-rw-r-----  1 oracle oinstall  104858112 Jun 12 19:15 redo02.log
-rw-r-----  1 oracle oinstall  104858112 Jun 12 19:15 redo03.log
-rw-r--r--  1 oracle oinstall  524296192 Jun 12 19:16 system01.dbf
-rw-r--r--  1 oracle oinstall   44048384 Jun  4  2011 temp01.dbf
-rw-r-----  1 oracle oinstall   94380032 Jun 12 19:16 testtbs01.dbf
-rw-r--r--  1 oracle oinstall   10493952 Jun 12 19:16 tools01.dbf
-rw-r--r--  1 oracle oinstall 1751130112 Jun 12 19:16 undotbs01.dbf
-rw-r--r--  1 oracle oinstall   26222592 Jun 12 19:16 users01.dbf
-rw-r--r--  1 oracle oinstall   47194112 Jun 12 19:16 xdb01.dbf
[root@oracle9ivm ora10g]# rm -f app02.dbf
[root@oracle9ivm ora10g]# cp ../app02.dbf .
[root@oracle9ivm ora10g]# ll
total 3015032
-rw-r-----  1 oracle oinstall   10493952 Jun 12 19:24 app01.dbf
-rw-r-----  1 root   root       10493952 Jun 12 19:24 app02.dbf
drwxr-xr-x  2 oracle oinstall       4096 Jun  6 16:34 arch
-rw-r-----  1 oracle oinstall    2039808 Jun 12 19:24 control01.ctl
-rw-r-----  1 oracle oinstall    2039808 Jun 12 19:24 control02.ctl
-rw-r-----  1 oracle oinstall    2039808 Jun 12 19:24 control03.ctl
-rw-r--r--  1 oracle oinstall   20979712 Jun 12 19:24 cwmlite01.dbf
-rw-r--r--  1 oracle oinstall   20979712 Jun 12 19:24 drsys01.dbf
-rw-r--r--  1 oracle oinstall  156639232 Jun 12 19:24 example01.dbf
-rw-r--r--  1 oracle oinstall   26222592 Jun 12 19:24 indx01.dbf
-rw-r--r--  1 oracle oinstall   20979712 Jun 12 19:24 odm01.dbf
-rw-r-----  1 oracle oinstall  104858112 Jun 12 19:24 redo01.log
-rw-r-----  1 oracle oinstall  104858112 Jun 12 19:24 redo02.log
-rw-r-----  1 oracle oinstall  104858112 Jun 12 19:24 redo03.log
-rw-r--r--  1 oracle oinstall  524296192 Jun 12 19:24 system01.dbf
-rw-r--r--  1 oracle oinstall   44048384 Jun  4  2011 temp01.dbf
-rw-r-----  1 oracle oinstall   94380032 Jun 12 19:24 testtbs01.dbf
-rw-r--r--  1 oracle oinstall   10493952 Jun 12 19:24 tools01.dbf
-rw-r--r--  1 oracle oinstall 1751130112 Jun 12 19:24 undotbs01.dbf
-rw-r--r--  1 oracle oinstall   26222592 Jun 12 19:24 users01.dbf
-rw-r--r--  1 oracle oinstall   47194112 Jun 12 19:24 xdb01.dbf
[root@oracle9ivm ora10g]# chown oracle.oinstall app02.dbf
[root@oracle9ivm ora10g]# ll
total 3015032
-rw-r-----  1 oracle oinstall   10493952 Jun 12 19:24 app01.dbf
-rw-r-----  1 oracle oinstall   10493952 Jun 12 19:24 app02.dbf
drwxr-xr-x  2 oracle oinstall       4096 Jun  6 16:34 arch
-rw-r-----  1 oracle oinstall    2039808 Jun 12 19:24 control01.ctl
-rw-r-----  1 oracle oinstall    2039808 Jun 12 19:24 control02.ctl
-rw-r-----  1 oracle oinstall    2039808 Jun 12 19:24 control03.ctl
-rw-r--r--  1 oracle oinstall   20979712 Jun 12 19:24 cwmlite01.dbf
-rw-r--r--  1 oracle oinstall   20979712 Jun 12 19:24 drsys01.dbf
-rw-r--r--  1 oracle oinstall  156639232 Jun 12 19:24 example01.dbf
-rw-r--r--  1 oracle oinstall   26222592 Jun 12 19:24 indx01.dbf
-rw-r--r--  1 oracle oinstall   20979712 Jun 12 19:24 odm01.dbf
-rw-r-----  1 oracle oinstall  104858112 Jun 12 19:24 redo01.log
-rw-r-----  1 oracle oinstall  104858112 Jun 12 19:24 redo02.log
-rw-r-----  1 oracle oinstall  104858112 Jun 12 19:24 redo03.log
-rw-r--r--  1 oracle oinstall  524296192 Jun 12 19:24 system01.dbf
-rw-r--r--  1 oracle oinstall   44048384 Jun  4  2011 temp01.dbf
-rw-r-----  1 oracle oinstall   94380032 Jun 12 19:24 testtbs01.dbf
-rw-r--r--  1 oracle oinstall   10493952 Jun 12 19:24 tools01.dbf
-rw-r--r--  1 oracle oinstall 1751130112 Jun 12 19:24 undotbs01.dbf
-rw-r--r--  1 oracle oinstall   26222592 Jun 12 19:24 users01.dbf
-rw-r--r--  1 oracle oinstall   47194112 Jun 12 19:24 xdb01.dbf
[root@oracle9ivm ora10g]#

SQL> startup mount;
ORACLE instance started.

Total System Global Area  236000356 bytes
Fixed Size                   451684 bytes
Variable Size             201326592 bytes
Database Buffers           33554432 bytes
Redo Buffers                 667648 bytes
Database mounted.
SQL> select file#,status,name from v$datafile;

     FILE# STATUS  NAME
---------- ------- -----------------------------------
         1 SYSTEM  /u01/oradata/ora10g/system01.dbf
         2 ONLINE  /u01/oradata/ora10g/undotbs01.dbf
         3 ONLINE  /u01/oradata/ora10g/cwmlite01.dbf
         4 ONLINE  /u01/oradata/ora10g/drsys01.dbf
         5 ONLINE  /u01/oradata/ora10g/example01.dbf
         6 ONLINE  /u01/oradata/ora10g/indx01.dbf
         7 ONLINE  /u01/oradata/ora10g/odm01.dbf
         8 ONLINE  /u01/oradata/ora10g/tools01.dbf
         9 ONLINE  /u01/oradata/ora10g/users01.dbf
        10 ONLINE  /u01/oradata/ora10g/xdb01.dbf
        11 ONLINE  /u01/oradata/ora10g/testtbs01.dbf

     FILE# STATUS  NAME
---------- ------- -----------------------------------
        12 ONLINE  /u01/oradata/ora10g/app01.dbf
        13 ONLINE  /u01/oradata/app02.dbf

13 rows selected.

SQL> alter database datafile 13 offline;

Database altered.

SQL> alter database rename file '/u01/oradata/app02.dbf' to '/u01/oradata/ora10g/app02.dbf';

Database altered.

SQL> select file#,status,name from v$datafile;

     FILE# STATUS  NAME
---------- ------- -----------------------------------
         1 SYSTEM  /u01/oradata/ora10g/system01.dbf
         2 ONLINE  /u01/oradata/ora10g/undotbs01.dbf
         3 ONLINE  /u01/oradata/ora10g/cwmlite01.dbf
         4 ONLINE  /u01/oradata/ora10g/drsys01.dbf
         5 ONLINE  /u01/oradata/ora10g/example01.dbf
         6 ONLINE  /u01/oradata/ora10g/indx01.dbf
         7 ONLINE  /u01/oradata/ora10g/odm01.dbf
         8 ONLINE  /u01/oradata/ora10g/tools01.dbf
         9 ONLINE  /u01/oradata/ora10g/users01.dbf
        10 ONLINE  /u01/oradata/ora10g/xdb01.dbf
        11 ONLINE  /u01/oradata/ora10g/testtbs01.dbf

     FILE# STATUS  NAME
---------- ------- -----------------------------------
        12 ONLINE  /u01/oradata/ora10g/app01.dbf
        13 OFFLINE /u01/oradata/ora10g/app02.dbf

13 rows selected.

SQL> alter database datafile 13 online;

Database altered.

SQL> select file#,status,name from v$datafile;

     FILE# STATUS  NAME
---------- ------- -----------------------------------
         1 SYSTEM  /u01/oradata/ora10g/system01.dbf
         2 ONLINE  /u01/oradata/ora10g/undotbs01.dbf
         3 ONLINE  /u01/oradata/ora10g/cwmlite01.dbf
         4 ONLINE  /u01/oradata/ora10g/drsys01.dbf
         5 ONLINE  /u01/oradata/ora10g/example01.dbf
         6 ONLINE  /u01/oradata/ora10g/indx01.dbf
         7 ONLINE  /u01/oradata/ora10g/odm01.dbf
         8 ONLINE  /u01/oradata/ora10g/tools01.dbf
         9 ONLINE  /u01/oradata/ora10g/users01.dbf
        10 ONLINE  /u01/oradata/ora10g/xdb01.dbf
        11 ONLINE  /u01/oradata/ora10g/testtbs01.dbf

     FILE# STATUS  NAME
---------- ------- -----------------------------------
        12 ONLINE  /u01/oradata/ora10g/app01.dbf
        13 ONLINE  /u01/oradata/ora10g/app02.dbf

13 rows selected.

SQL> alter database open;

Database altered.

SQL>