ora-0110,01157数据库open不了

现象：

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01157: cannot identify/lock data file 12 - wsj DBWR trace file
ORA-01110: data file 12: '+DG_INDEX/rwsj_wsj_index_0001'

 

解决：
SQL> alter database create datafile '+DG_INDEX/rwsj_wsj_index_0001';

Database altered.

SQL> alter database datafile '+DG_INDEX/rwsj_wsj_index_0001' offline drop;

Database altered.

SQL> alter database open;

Database altered.