ORA-01113: file 1 needs media recovery解决 问题：

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: '/u01/app/oracle/oradata/dtberp/system01.dbf'

解决方法：

SQL> RECOVER DATAFILE  '/u01/app/oracle/oradata/dtberp/system01.dbf'
Media recovery complete.
SQL> recover tablespace system;
Media recovery complete.
SQL> RECOVER DATABASE;
Media recovery complete.
SQL> ALTER DATABASE OPEN;
Database altered.