Oracle10g 如何给scott用户解锁并修改密码

问题描述：
    新装完Oracle10g后，用scott/tiger测试，会出现以下错误提示：
    oracle10g the account is locked
    oracle10g the password has expired

原因：默认Oracle10g的scott不能登陆。

解决：
（1）conn sys/sys as sysdba; --以DBA的身份登录
（2）alter user scott account unlock; --然后解锁
（3）conn scott/tiger --弹出一个修改密码的对话框，修改一下密码就可以了

SQL> conn sys/sys as sysdba;
     Connected.
SQL> alter user scott account unlock;
     User altered.
SQL> commit;
     Commit complete.
SQL> conn scott/tiger  --请输入新密码，并确认后OK
Password changed
Connected.

SQL> connect sys/syspassword as sysdba
Connected.
SQL> alter user hr identified by new_hr_password;