二孝卜禅、如果服务器状态正常，检查Oracle客户端$ORACLE\NETWORK\ADMIN\TNSNAME.ORA是否正确配置；

三、客户弊悔端也配置正常，确认客户端是否安装有多个Oracle产品，按如下步骤解决

你的机器上应该是安装了多个Oracle产品，默认的sqlplus和PL/SQL Developer使用了不同路径下的tnsname。

这个问题有两种解决方法：

1.配置每个Oracle产品的$ORACLE_HOME/NETWORK/ADMIN/TNSNAME.ORA

2.配置PL/SQL Developer使用的tnsname

打开PL/SQL Developer，点击“Cancel”进入“PLS/SQL Developer(Not logged on)”，选择Tools 巧尘Preferences 打开Preferences窗口，选择 Connection Oracle Home下拉框，选择tnsname。

服务器

[oracle@ghy-database-test ~]$ lsnrctl stop

LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 22-SEP-2014 16:39:35

Copyright (c) 1991, 2014, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ghy-database-test)(PORT=1521)))

The command completed successfully

客户端

C:\Documents and Settings\Administratorsqlplus sys/Clark3721@testdb as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on 星期一 9月 22 16:39:39 2014

Copyright (c) 1982, 2005, Oracle. All rights reserved.

ERROR:

ORA-12541: TNS: 无监携含李听程序

请输入用户老郑名:

服务器

[oracle@ghy-database-test ~]$ lsnrctl start

LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 22-SEP-2014 16:41:04

.............................

The command completed successfully

[oracle@ghy-database-test ~]$ lsnrctl status

LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 22-SEP-2014 16:41:46

Copyright (c) 1991, 2014, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ghy-database-test)(PORT=1521)))

STATUS of the LISTENER

------------------------

Alias LISTENER

Version TNSLSNR for Linux: Version 12.1.0.2.0 - Production

Start Date22-SEP-2014 16:41:04

Uptime0 days 0 hr. 0 min. 46 sec

Trace Level off

Security ON: Local OS Authentication

SNMP OFF

Listener Parameter File /u01/app/辩迟oracle/product/12.1.2/db/network/admin/listener.ora

Listener Log File /u01/app/oracle/diag/tnslsnr/ghy-database-test/listener/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ghy-database-test)(PORT=1521)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=ghy-database-test)(PORT=5500))(Security=(my_wallet_directory=/u01/app/oracle/admin/testdb/xdb_wallet))(Presentation=HTTP)(Session=RAW))

Services Summary...

Service "testdb" has 1 instance(s).

Instance "testdb", status READY, has 1 handler(s) for this service...

Service "testdbXDB" has 1 instance(s).

Instance "testdb", status READY, has 1 handler(s) for this service...

Service "testpdb1" has 1 instance(s).

Instance "testdb", status READY, has 1 handler(s) for this service...

Service "testpdb2" has 1 instance(s).

Instance "testdb", status READY, has 1 handler(s) for this service...

Service "testpdb3" has 1 instance(s).

Instance "testdb", status READY, has 1 handler(s) for this service...

Service "testpdb4" has 1 instance(s).

Instance "testdb", status READY, has 1 handler(s) for this service...

The command completed successfully

客户端

C:\Documents and Settings\Administratorsqlplus sys/Clark3721@testdb as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on 星期一 9月 22 16:42:46 2014

Copyright (c) 1982, 2005, Oracle. All rights reserved.

连接到:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

With the Partitioning, OLAP, Advanced Analytics and Real Application Testing opt

ions

SQL

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