5、启动数据库
SQL> startup
ORACLE instance started.
Total System Global Area 4275781632 bytes
Fixed Size                  2220200 bytes
Variable Size            2113933144 bytes
Database Buffers         2147483648 bytes
Redo Buffers               12144640 bytes
Database mounted.
Database opened.
SQL> exit
　　6、修改用户密码
　　SQL> alter user oaadmin identified by oaadmin;
　　User altered.
　　7、解锁帐户
　　SQL> alter user oaadmin account unlock;
　　User altered.
　　上面第4步也可以利用一条命令直接处理：
select 'host cp /u03/backup/'||substr(name，(instr(name，'/'，-1)+1))||
' '||name from v$controlfile
union all
select 'host cp /u03/backup/'||substr(name，(instr(name，'/'，-1)+1))||
' '||name from v$controlfile
union all
select 'host cp /u03/backup/'||substr(member，(instr(member，'/'，-1)+1))
||' '||member from v$logfile
union all
select 'host cp /u03/backup/spfile${ORACLE_SID}.ora $ORACLE_HOME/dbs/'
from dual
union all
select 'host cp /u03/backup/orapw${ORACLE_SID} $ORACLE_HOME/dbs/'
from dual;