如果您目前擁有一個冷備份，但是缺少了其中的一個數據文件，但你目前存在所有的歸檔，如果您要恢復數據文件，可以參考以下的示例：

[oracle@jumper eygle]$ sqlplus "/ as sysdba"

SQL*Plus: Release 9.2.0.4.0 - Production on Sun Aug 20 01:22:50 2006

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

Connected to an idle instance.

SQL> startup mount

ORACLE instance started.

Total System Global Area 252777592 bytes

Fixed Size 451704 bytes

Variable Size 134217728 bytes

Database Buffers 117440512 bytes

Redo Buffers 667648 bytes

Database mounted.

SQL> alter database open;

alter database open

*

ERROR at line 1:

ORA-01157: cannot identify/lock data file 3 - see DBWR trace file

ORA-01110: data file 3: '/opt/oracle/oradata/eygle/eygle02.dbf'

SQL> alter database create datafile 3 as '/opt/oracle/oradata/eygle/eygle02.dbf';

Database altered.

SQL> select name from v$datafile;

NAME

-------------------------------------------------------

/opt/oracle/oradata/eygle/system01.dbf

/opt/oracle/oradata/eygle/undotbs01.dbf

/opt/oracle/oradata/eygle/eygle02.dbf

/opt/oracle/oradata/eygle/eygle01.dbf

SQL> alter database open;

alter database open

*

ERROR at line 1:

ORA-01113: file 3 needs media recovery

ORA-01110: data file 3: '/opt/oracle/oradata/eygle/eygle02.dbf'

SQL> recover datafile 3;

Media recovery complete.

SQL> alter database open;

Database altered.

SQL>

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