oracle修改密码解锁用户

--查看所有用户名
select distinct owner from all_objects;
--解锁用户
alter user username account unlock;
--修改用户system的密码
alter user system identified by 123456789;
 --设置用户system密码不过期
alter user system  password expire;

原文链接：https://blog.csdn.net/qq_39705237/article/details/132982101