刪除了DBF文件，遇到
ORA-01157: cannot identify/lock data file 101 – see DBWR trace file
ORA-01110: data file 101: ‘xxxx.dbf’
使用以下方式可以進到到OPEN 狀態
alter database datafile 101 offline drop;
SQL> startup force
ORACLE instance started.
Total System Global Area 838860800 bytes
Fixed Size 2076400 bytes
Variable Size 218104080 bytes
Database Buffers 612368384 bytes
Redo Buffers 6311936 bytes
Database mounted.
Database opened.