PLSQL 连接数据库配置

1、下载Instant Client。下载完成后解压该文件。如：我将其解压在E:\oracleClient\instantclient_11_2该路径下。进入到instantclient_11_2下创建目录NETWORK，然后再NETWORK下建立目录ADMIN。在ADMIN目录下建立tnsnames.ora文件，在该tnsnames.ora文件中添加如下内容：

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 =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = orcl)

    )

  )

128 =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.48.128)(PORT = 1521))

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = orcl.wtLinux)

    )

  )

2：环境变量的配置

新增下面两个变量

TNS_ADMIN 　　　tnsnames.ora所在路径 如 E:\oracleClient\instantclient_11_2\NETWORK\ADMIN

NLS_LANG 　　　SIMPLIFIED CHINESE_CHINA.ZHS16GBK

3：下载并安装PLSQL Developer

安装完成后进入PLSQL Developer，选择tools->preferences->connection

Oracle Home             

E:\oracleClient\instantclient_11_2 或 E:\app\lijuan\product\11.2.0\dbhome_1（本机oracle安装主目录）

OCI library

E:\oracleClient\instantclient_11_2\oci.dll

修改完毕后保存并重启PLSQL Developer就可以使用该工具了。