指定架构时，Oracle SQLPlus ORA-01017无效的凭证

Question

在Oracle11g数据库上，这可以工作：

SQL> connect USER/pass
Connected.

但是，这不是：

SQL> connect USER/pass@db
ERROR:
ORA-01017: invalid username/password; logon denied

我已经执行：

SQL> grant connect to USER;
Grant succeeded.

我想念什么？

tnsnames.ora：

DB =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = a.dom.b.com)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = db)
    )
  )

编辑：

:> sqlplus USER/pass
SQL*Plus: Release 11.1.0.7.0 - Production on Mon Mar 11 15
Copyright (c) 1982, 2008, Oracle.  All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production

其他两个没有。

:> sqlplus USER/pass@db
SQL*Plus: Release 11.1.0.7.0 - Production on Mon Mar 11 15:04:44 2013
Copyright (c) 1982, 2008, Oracle.  All rights reserved.

ERROR:
ORA-01017: invalid username/password; logon denied

这产生标识符错误：

:> sqlplus USER/pass@db//localhost:1521
SQL*Plus: Release 11.1.0.7.0 - Production on Mon Mar 11 15:10:38 2013
Copyright (c) 1982, 2008, Oracle.  All rights reserved.

ERROR:
ORA-12154: TNS:could not resolve the connect identifier specified

我已经验证了tnsnames.ora条目，并且我正确拼写了服务。

编辑2：

:> lsnrctl status

LSNRCTL for 64-bit Windows: Version 11.1.0.7.0 - Production on 11-MAR-2013 15:14:19

Copyright (c) 1991, 2008, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=a.dom.b.com)(PORT=1521
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for 64-bit Windows: Version 11.1.0.7.0 - Production
Start Date                01-MAR-2013 16:15:25
Uptime                    9 days 21 hr. 59 min. 8 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   d:\oracle\product\11.1.0\db_1\network\admin\listener.ora
Listener Log File         d:\oracle\diag\tnslsnr\TMDEV100\listener\alert\log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=a.dom.b.com)(PORT=1521)))
Services Summary...
Service "db" has 1 instance(s).
  Instance "db", status READY, has 1 handler(s) for this service...
...
...
The command completed successfully

Answer 1

如果不包括@db，它将通过TWO_TASk环境变量进行连接，或者与您所连接的计算机上的数据库进行本地连接。 @db将通过tnsnames.ora查找连接信息，然后进行连接。 我猜您正在连接到两个不同的数据库。 一个拥有用户名/密码组合，另一个则没有。