Oracle客户端工具连接数据库服务器问题解决整理-Mysql Tutorial-php.cn

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Oracle客户端工具连接数据库服务器问题解决整理

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Jun 07, 2016 pm 05:29 PM

经常遇到PL/SQL Developer等依赖Client的工具无法连接Oracle数据库服务器的问题。至今也没完全理清楚，先发个帖总结一下目前的方

经常遇到PL/SQL Developer等依赖Client的工具无法连接Oracle数据库服务器的问题。至今也没完全理清楚，先发个帖总结一下目前的方法，后面会不断完善。

方法一：

重启Oracle服务器端相关服务，包括...TNSListener，所用的数据库实例的服务。可直接在Windows的“服务”中重启。或者（可使用的命令）：

lsnrctl stop
lsnrctl start
lsnrctl reload
sqlplus / as sysdba;
startup;

这个方法试过多次有效，但原因未知，求真相。

方法二：

使用Net Configuration Assist配置服务器端和客户端。

Oracle服务器端需要设置listener（监听程序），设置结果影响listener.ora（...\db_1\NETWORK\ADMIN）。Client端（客户端）需要配置“本地Net服务名配置”，可能影响tnsnames.ora和sqlnet.ora两个文件。若是Oracle Client，，则文件位置是...\client_1\NETWORK\ADMIN

方法三：

若装有Oracle Client，则可使用Enterprise Manager Console添加数据库连接，会修改tnsnames.ora文件（...\client_1\NETWORK\ADMIN）。

方法四：

查看sqlnet.ora中是否有NAMES，DIRECTORY_PATH等，可能与此有关。

# sqlnet.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.

# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.

SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

注意：

1. Enterprise Manager Console与Net Configuration Assist添加的数据库连接描述符不同，前者为...CONNECT_DATA=(SID=...)(SERVER=...)...，后者为...(SERVICENAME=...)...。

2. Enterprise Manager Console中删除一条连接后，tnsnames.ora中的描述字符串不会自动删除；Net Configuration Assist中删除一条本地Net服务配置后，tnsnames.ora文件中对应的描述字符串会自动删除。

3. 若安装配置OWB（Oracle Warehouse Builder），则文件位置是...\client_1\NETWORK\ADMIN

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