删除数据文件后，抛出错误，解决方案如下
SQL> startup
ORA-01157: cannot identify/lock data file 25 - see DBWR trace file
ORA-01110: data file 25: '/oradata/APPRPTFASDLS_SCHE_DATA_TBS.dbf'
SQL> alter database datafile 25 offline drop;
Database altered.
SQL> alter database open;
Database altered.