oracle数据库文件损坏如何恢复，
下面是一次模拟实验，如下

SQL> create tablespace test datafile '/u01/app/oracle/oradata/lhz/test01.dbf' size 10M;

SQL>  create table test as  select * from dba_objects;

SQL> alter table test move tablespace test;

SQL> select count(*) from test;

 COUNT(*)

    50881

2. 然后用vi修改数据文件

3.随意输入什么字符，保存

SQL> shutdown immediate;

Database dismounted.

5.发动实例

ORACLE instance started.

Total System Global Area  599785472 bytes

Variable Size             243272768 bytes

Redo Buffers                6287360 bytes

ORA-01157: cannot identify/lock data file 9 - see DBWR trace file

6. 先将损坏数据文件offline，并翻开数据库实例

Database altered.

Database altered.

SQL> alter database create datafile '/u01/app/oracle/oradata/lhz/test01.dbf';

SQL> recover datafile 9;

SQL> alter database datafile 9 online;

8.验证康复结果：

SQL> select count(*) from andylhz.test;

 COUNT(*)

    50881

恢复完成！