windows2008上的数据库版本为11.2.0.4.0，数据库打开为mount状态。报错如下：

SQL> startup

ORACLE instance started.

Total System Global Area 1610612736 bytes

Fixed Size 779080 bytes

Variable Size 535043256 bytes

Database Buffers 1073741824 bytes

Redo Buffers 1048576 bytes

Database mounted.

ORA-01113: file 1 needs media recovery

ORA-01110: data file 1: 'c:\app\administrator\oradata\orcl\system01.dbf'

解决方法：

SQL> RECOVER DATAFILE  'c:\app\administrator\oradata\orcl\system01.dbf'

Media recovery complete.

SQL> recover tablespace system;

Media recovery complete.

SQL> RECOVER DATABASE;

Media recovery complete.

SQL> ALTER DATABASE OPEN;

Database altered.