startup时报‘ORA-01589: must use RESETLOGS or NORESETLOGS option for database open‘;
alter database open resetlogs;时报错:
ERROR at line 1:
ORA-01157: cannot identify/lock data file 15 - see DBWR trace file
ORA-01110: data file 15: '/u01/app/oracle/oradata/demo1UNDOTBS1.DBF'
drop时提示我database没有打开。数据库起不了
追答你启动数据库到mount模式 startup mount
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