oracle 修改密码策略，解除3个月锁定
select username,account_status,expiry_date,profile from dba_users where username='username' ;
select * from dba_profiles where profile='DEFAULT' and resource_name='PASSWORD_LIFE_TIME';
ALTER PROFILE DEFAULT LIMIT PASSWORD_LIFE_TIME UNLIMITED;
ALTER USER 'username' ACCOUNT UNLOCK IDENTIFIED BY '12345';
