1,首先下载oracle的客户端,并解压。

我下载的是:instantclient-basic-nt-12.1.0.2.0.zip

2,下载plsqlDeveloper,并安装。如果plsqlDeveloper是32位instantclient也要是32位。

3,创建一个tnsnames.ora文件:

E:\instantclient-basic-nt-12.1.0.2.0\instantclient_12_1\NETWORK\ADMIN\tnsnames.ora

没有NETWORK\ADMIN\目录就自己建一个。

4,在tnsnames.ora内添加以下内容:

ORACLR_CONNECTION_DATA =   
  (DESCRIPTION =   
    (ADDRESS_LIST =   
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))   
    )   
    (CONNECT_DATA =   
      (SID = CLRExtProc)   
      (PRESENTATION = RO)   
    )   
  )   
  
NOVA =                     
  (DESCRIPTION =   
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.20.244)(PORT = 1521))   
    (CONNECT_DATA =   
      (SERVER = DEDICATED)   
      (SERVICE_NAME = orcl)   
    )   
  ) 

5,添加环境变量

变量名TNS_ADMIN  变量值E:\instantclient-basic-nt-12.1.0.2.0\instantclient_12_1\NETWORK\ADMIN

变量名NLS_LANG  变量值AMERICAN_AMERICA.AL32UTF8

6,以上配置好就可以使用plsql登录了。

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