如何在Oracle里设置访问多个SQL Server数据库？假设我 们要在ORACLE里同时能访问SQL Server里默认的pubs和Northwind两个数据库。 1、在安装了ORACLE9i Standard Edition或者ORACLE9i Enterprise Edition的windows机器上(IP:192.168.0.2), 产品要选了透明网关(Oracle Transparent Gateway)里访问Microsoft SQL Server数据库 $ORACLE9I_HOME\tg4msql\admin下新写initpubs.ora和initnorthwind.ora配置文件. initpubs.ora内容如下: HS_FDS_CONNECT_INFO="SERVER=SQLSERVER_HOSTNMAE;DATABASE=pubs" HS_DB_NAME=pubs HS_FDS_TRACE_LEVEL=OFF HS_FDS_RECOVERY_ACCOUNT=RECOVER HS_FDS_RECOVERY_PWD=RECOVER initnorthwind.ora内容如下: HS_FDS_CONNECT_INFO="SERVER=sqlserver_hostname;DATABASE=Northwind" HS_DB_NAME=Northwind HS_FDS_TRACE_LEVEL=OFF HS_FDS_RECOVERY_ACCOUNT=RECOVER HS_FDS_RECOVERY_PWD=RECOVER $ORACLE9I_HOME\network\admin 下listener.ora内容如下: LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)(PORT = 1521)) ) ) ) SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = test9) (ORACLE_HOME = d:\oracle\ora92) (SID_NAME = test9) ) (SID_DESC= (SID_NAME=pubs) (ORACLE_HOME=d:\Oracle\Ora92) (PROGRAM=tg4msql) ) (SID_DESC= (SID_NAME=northwind) (ORACLE_HOME=d:\Oracle\Ora92) (PROGRAM=tg4msql) ) ) 重启动这台做gateway的windows机器上(IP:192.168.0.2)TNSListener服务. (凡是按此步骤新增可访问的SQL Server数据库时，TNSListener服务都要重启动) 2、ORACLE8I，ORACLE9I的服务器端配置tnsnames.ora, 添加下面的内容: pubs = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)(PORT = 1521)) ) (CONNECT_DATA = (SID = pubs) ) (HS = pubs) ) northwind = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)(PORT = 1521)) ) (CONNECT_DATA = (SID = northwind) ) (HS = northwind) ) 保存tnsnames.ora后,在命令行下 tnsping pubs tnsping northwind 出现类似提示，即为成功 Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2) (PORT = 1521))) (CONNECT_DATA = (SID = pubs)) (HS = pubs)) OK（20毫秒） Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2) (PORT = 1521))) (CONNECT_DATA = (SID = northwind)) (HS = northwind)) OK（20毫秒） 设置数据库参数global_names=false。 设置global_names=false不要求建立的数据库链接和目的数据库的全局名称一致。global_names=true则要求, 多少有些不方便。 oracle9i和oracle8i都可以在DBA用户下用SQL命令改变global_names参数 alter system set global_names=false; 建立公有的数据库链接: create public database link pubs connect to testuser identified by testuser_pwd using 'pubs'; 本新闻共2页,当前在第1页 1 2 |
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