PLSQL连接本地oracle或远程oracle数据库实现随意切换功能

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前言

先赞后看，此生必赚！

每次安装Oracle以后，都会出现使用plsql连接不上的问题！多次重启电脑、重装系统的磨人经历之后，

今天看到这篇文章算是你我之幸！希望能帮助广大技术人员减少一些时间，顺利进行连接！

注：也可以用plsql连接远程数据库（只要有oracle的network\admin\tnsnames.ora就行）。

首先下载64位oracle以及32位轻量级客户端(注意版本的对应，我用的是11g的oracle和11.2的客户端)：

点击进入oracle下载页面点击进入客户端下载页面

以下步骤请自行更改路径，不然，出错了别怪我哦：

step1 复制network文件

oracle安装到某路径下，安装步骤很简单，网上可以搜到！

客户端随便解压到一个路径，我的是放在D:\app\shuhao\instantclient_11_2了。

然后把oracle中的D:\app\shuhao\product\11.2.0\dbhome_1里面的整个network文件夹复制，

粘贴到客户端文件夹D:\app\shuhao\instantclient_11_2下面，如下图所示：

step2 修改配置文件

2.1 修改oracle数据库文件

D:\app\shuhao\product\11.2.0\dbhome_1\NETWORK\ADMIN\listener.ora文件内容，添加一个SID_DESC：

# listener.ora Network Configuration File: D:\app\shuhao\product\11.2.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
 
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:\app\shuhao\product\11.2.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\app\shuhao\product\11.2.0\dbhome_1\bin\oraclr11.dll")
    )
#下面的SID_DESC是新增加的内容，注意修改ORACLE_HOME路径
    (SID_DESC =
      (SID_NAME = orcl)
      (ORACLE_HOME = D:\app\shuhao\product\11.2.0\dbhome_1)
      (GLOBAL_DBNAME = orcl)
    )
  )
 
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    )
  )
 
ADR_BASE_LISTENER = D:\app\shuhao

2.2 修改oracle数据库文件

D:\app\shuhao\product\11.2.0\dbhome_1\NETWORK\ADMIN\tnsnames.ora文件内容，源文件没有做改动：

# tnsnames.ora Network Configuration File: D:\app\shuhao\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
 
ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = orcl)
    )
  )
 
LISTENER_ORCL =
  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
 
ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

2.3 修改客户端文件

D:\app\shuhao\instantclient_11_2\network\admin\tnsnames.ora文件内容:

# tnsnames.ora Network Configuration File: D:\app\shuhao\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
 
ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = orcl)
    )
  )
 
LISTENER_ORCL =
  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
 
ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )
#新增 @ 标识符，用于区分本地与远程oracle
[email protected] =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.164)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )