oracle 11g建立DBLink访问sql server数据库

1.安装oracle数据库(步骤省略)

（IP：172.29.29.36）安装路径：E:oracleproduct11.2.0dbhome_1

2.安装oracle gateways透明网关（安装步骤省略）

（IP：172.29.29.36）安装路径：E:oracleproduct11.2.0dbhome_1

注：oracle gateways的安装路径应与oracle的路径一致，据说可以不装在一起，但是本人测试发现后续访问的时候有报错，具体原因木有找出来，但是装在同一个目录，经 过测试是可行的~~

3.sql server安装服务器地址：172.29.29.39

4.配置

（1）E:oracleproduct11.2.0dbhome_1dg4msqladmin目录下：

initdg4msql.ora文件内容

HS_FDS_CONNECT_INFO=172.29.29.39:1433//AstCTI #安装sql server的ip地址，默认的端口，数据库名
HS_FDS_TRACE_LEVEL=OFF
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER

listener.ora.sample文件内容

LISTENER =
 (ADDRESS_LIST=
      (ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
 )

SID_LIST_LISTENER=
  (SID_LIST=
      (SID_DESC=
         (SID_NAME=dg4msql)
         (ORACLE_HOME=E:oracleproduct11.2.0dbhome_1)
         (PROGRAM=dg4msql)
      )
  )

#CONNECT_TIMEOUT_LISTENER = 0 

dg4msql  =
  (DESCRIPTION=
    (ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
    (CONNECT_DATA=(SID=dg4msql))
    (HS=OK)
  ) 

tnsnames.ora文件内容

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

dg4msql  =
  (DESCRIPTION=
    (ADDRESS=(PROTOCOL=tcp)(HOST=172.29.29.36)(PORT=1521))
    (CONNECT_DATA=(SID=dg4msql))
    (HS=OK)
  ) 

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    )
  )

SID_LIST_LISTENER=
  (SID_LIST=
      (SID_DESC=
         (SID_NAME=dg4msql)
         (ORACLE_HOME=E:oracleproduct11.2.0dbhome_1)
         (PROGRAM=dg4msql)
      )
  )
ADR_BASE_LISTENER = E:oracle

-- Drop existing database link 
drop database link DBTEST1;
-- Create database link 
create database link DBTEST1
  connect to SA identified by "123456" --sa 123456分别是sql server数据库的用户名密码
  using 'dg4msql';

6.连接访问：select * from cti_agent_status_record@dbtest1 order by "begin_time" desc;

ps:如果习惯使用pl/sql的宝宝们，在你们的pl/sql的“工具”——“首选项”中配置了oracle主目录名，则要把该配置下的listener.ora和tnsnames.ora文件换成跟E:oracleproduct11.2.0dbhome_1NETWORKADMIN目录下的这两个文件的内容。

（编辑：李大同）

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