1 show user
2 conn / as sysdba
3:alter user hr account unlock
baocuo ORA-01017
1:conn / as sysdba
2: alter user hr identified by hr ;
conn hr/hr
以上是关于hr的用户解锁的例子，（初学者）。
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1:show user :查看当前的用户
2：desc dba_users;
3：select username, account_status from dba_users order by username;
可以查看用户的权限
4：alter user hr account unlock;(这是解锁）
更改hr用户的权限
5：alter user hr identified by hr;
更改hr用户的密码
