在oracle的SQLplus客户端登录数据库，sqlplus system/oracle@orcl可以登录，但是加上as sysdba就报错：
[oracle@test ~]$ sqlplus system/oracle@orcl
SQL*Plus: Release 12.2.0.1.0 Production on Thu Jun 27 23:48:41 2019
Copyright (c) 1982, 2016, Oracle. All rights reserved.
Last Successful login time: Thu Jun 27 2019 07:45:24 +08:00
Connected to:
Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
SQL> exit
Disconnected from Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
[oracle@test ~]$ sqlplus system/oracle@orcl as sysdba
SQL*Plus: Release 12.2.0.1.0 Production on Thu Jun 27 23:48:54 2019
Copyright (c) 1982, 2016, Oracle. All rights reserved.
ERROR:
ORA-01017: invalid username/password; logon denied
Enter user-name:
请问这是什么原因?谢谢！
