安装完成Oracle11gR2之后，不需要安装Oracle client，只需要绿色版instantclient，即可以用PL/SQL直接连接Oracle。
这两天一直跟Oracle干上了，各种问题各种纠结。。。主要是各种连接Oracle的问题
1.PL/SQL连接Oracle
安装完成Oracle11gR2之后，不需要安装Oracle client，只需要绿色版instantclient，即可以用PL/SQL直接连接Oracle。
设置如下：
0）下载instantclient_11_2（官方下载地址：）
1）打开PL/SQL，跳过登录界面，点Tools->Preferences，配置红框里的项目（假设instantclient_11_2放在D盘根目录下）：
2）重新打开PL/SQL，在登录界面填写信息如图：
上图中，数据库一栏，“/”后面填写要连接的数据库实例名
3）点击确定即可连接
2.配置Oracle远程连接
远程连接一直没配置成功，，后来找了个办法，解决了，不一定适用多数情况
1）打开Oracle配置和移植工具里的Net Manager工具，向Listener中添加一个地址
其中，主机填写你的IP地址，，端口号不要与其他的地址冲突
2）配置完成后，重启监听服务
lsnrctl stop
lsnrctl start
3）在远程机器用PL/SQL连接成功
数据库一栏的IP地址要写远程主机的IP，即第1步中Listener中添加的地址
上述第1步，也可以直接修改Listener.ora文件，路径为 %ORACLE_HOME%\NETWORK\ADMIN\listener.ora
在Listener中添加如下信息：
重启监听服务即可。。。
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