1、   在oracle server上安装 10201_gateway_win32.zip。使用OUI，在安装文件选择…./10201_gateway_win32/stage/product.xml，安装路径选择之前安装的OracleHome。

2、   配置OracleHome/tg4msql/inittg4msql.ora。内容如下：

HS_FDS_CONNECT_INFO="SERVER=×.×.21.7;DATABASE=mssql_db"

HS_FDS_TRACE_LEVEL=OFF

HS_FDS_RECOVERY_ACCOUNT=RECOVER

HS_FDS_RECOVERY_PWD=RECOVER

3、   配置OracleHome/NETWORK/ADMIN/listener.ora。内容如下：

SID_LIST_LISTENER =

  (SID_LIST =

    (SID_DESC =

      (SID_NAME = PLSExtProc)

      (ORACLE_HOME = D:\software\oracle10g\product\10.2.0\db_1)

      (PROGRAM = extproc)

    )

    (SID_DESC =

      (SID_NAME = tg4msql)

      (ORACLE_HOME = D:\software\oracle10g\product\10.2.0\db_1)

      (PROGRAM = tg4msql)

    )

  )

LISTENER =

  (DESCRIPTION_LIST =

    (DESCRIPTION =

      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))

    )

    (DESCRIPTION =

      (ADDRESS = (PROTOCOL = TCP)(HOST = ×.×.37.36)(PORT = 1521))

    )

  )

4、   配置OracleHome/NETWORK/ADMIN/tnsnames.ora。内容如下：

ORADB =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = ×.×.37.36)(PORT = 1521))

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = ORADB)

    )

  )

tg4msql =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = ×.×.37.36)(PORT = 1521))

    (CONNECT_DATA =

      (SID = tg4msql)

    )

     (HS = OK)

  )

5、   重启监听：

lsnrctl stop

       lsnrctl start

6、   在oracle上创建database link，此处注意用户名和密码是区分大小写的，所以必须要用双引号引起来。内容如下：

create  public  database  link MS_LINK.REGRESS.RDBMS.DEV.US.ORACLE.COM

  connect  to “sa” identified by “sa”

  using 'tg4msql';

7、   这样就可以在oracle上通过透明网关访问sql server了。如：

Select * from sysobjects@ms_link