PL/SQL Developer不安装客户端连接远程oracle数据库

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1、下载敏捷客户端InstantClient(40M左右,选择适合自己的下载,我的是
 
instantclient-basic-win32-11.2.0.1.0.zip )
http://download.csdn.net/detail
2、下载安装PLSQL(66M左右):
http://download.csdn.net/download
3、解压 
 
instantclient_12_1.rar到新建文件夹,如  D:/oracleclient/instantclient_11_2
用文本文档创建tnsnames.ora ,内容大致如下:
# TNSNAMES.ORA Network Configuration File: /opt/oracle/product/9204/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.          //以上为注释内容,因为我的tnsnames.ora是直接从服务器上download的
 
LISTENER_ORCL =
  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))


ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )

ORCL =                                                                                                   //数据库名
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)                                                               //数据库名
    )
  )

到我的电脑、属性、高级、环境变量中添加一个环境变量,变量名为TNS_ADMIN,值为tnsnames.ora文件所在路径,
例如:D:/oracleclient/instantclient_11_2

4、安装完毕PLSQL后,启动,cancel,依次点击Tools->Preferences->Connection:  
       Oracle Home=D:/oracleclient/instantclient_11_2

OCI library=D:/oracleclient/instantclient_11_2/oci.dll

重新启动PLSQL即可进入数据库,初次登陆可能存在中文乱码的问题,解决方法如下:

到我的电脑、属性、高级、环境变量中添加一个环境变量:
变量名:NLS_LANG
变量值:AMERICAN_AMERICA.ZHS16GBK
重新连接,即可正常显示中文。
如果想转换为UTF8字符集,可以赋予“NLS_LANG”为 “AMERICAN_AMERICA.UTF8,其他编码同上
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