1、问题描述：ORA-28000: The Account is locked
查看日志：
2、处理：alter user username account unlock
3、模拟问题：
alter profile default limit failed_login_attempts 3；
select resource_name,limit from dba_profiles where resource_name='FAILED_LOGIN_ATTEMPTS';
4、锁定放开：alter profile default limit failed_login_attempts unlimited;