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你知道如何在Oracle SQL Server中設(shè)置訪問多個相關(guān)的數(shù)據(jù)庫？如果我們想要在Oracle SQL Server里同時訪問的話，默認的有pubs與Northwind兩個重要的數(shù)據(jù)庫。以下就是相關(guān)內(nèi)容的介紹。
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1、在安裝了Oracle9i Standard Edition或者Oracle9i Enterprise Edition的windows機器上(IP:192.168.0.2), 產(chǎn)品要選了透明網(wǎng)關(guān)(Oracle Transparent Gateway)里訪問Microsoft SQL Server數(shù)據(jù)庫
ORACLE9I_HOMEtg4msqladmin下新寫initpubs.ora和initnorthwind.ora配置文件.
initpubs.ora內(nèi)容如下:
- HS_FDS_CONNECT_INFO="SERVER=SQLSERVER_HOSTNMAE; DATABASE=pubs"
- HS_DB_NAME=pubsHS_FDS_TRACE_LEVEL=OFF
- HS_FDS_RECOVERY_ACCOUNT=RECOVER
- HS_FDS_RECOVERY_PWD=RECOVER
initnorthwind.ora內(nèi)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_HOMEnetworkadmin 下listener.ora內(nèi)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:oracleora92)
- (SID_NAME = test9)
- )
- (SID_DESC=
- (SID_NAME=pubs)
- (ORACLE_HOME=d:OracleOra92)
- (PROGRAM=tg4msql)
- )
- (SID_DESC=
- (SID_NAME=northwind)
- (ORACLE_HOME=d:OracleOra92)
- (PROGRAM=tg4msql)
- )
- )
重啟動這臺做gateway的Windows機器上(IP:192.168.0.2)TNSListener服務(wù)(凡是按此步驟新增可訪問的Oracle SQL Server數(shù)據(jù)庫時，TNSListener服務(wù)都要重啟動)。
2、Oracle8i，Oracle9i的服務(wù)器端配置tnsnames.ora, 添加下面的內(nèi)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
出現(xiàn)類似提示，即為成功:
- 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）
設(shè)置數(shù)據(jù)庫參數(shù)global_names=false。
設(shè)置global_names=false不要求建立的數(shù)據(jù)庫鏈接和目的數(shù)據(jù)庫的全局名稱一致。global_names=true則要求, 多少有些不方便。
oracle9i和oracle8i都可以在DBA用戶下用SQL命令改變global_names參數(shù)
- alter system set global_names=false;
建立公有的數(shù)據(jù)庫鏈接:
- create public database link pubs
- connect to testuser identified by testuser_pwd using 'pubs';
- create public database link northwind
- connect to testuser identified by testuser_pwd using 'northwind';
(假設(shè)SQL Server下pubs和northwind已有足夠權(quán)限的用戶登陸testuser,密碼為testuser_pwd)
訪問Oracle SQL Server下數(shù)據(jù)庫里的數(shù)據(jù):
- select * from stores@pubs;
- ...... ......select *
- from region@northwind;
3、使用時的注意事項
ORACLE通過訪問SQL Server的數(shù)據(jù)庫鏈接時，用select * 的時候字段名是用雙引號引起來的。
例如：
- create table stores as select * from stores@pubs;
- select zip from stores；
ERROR 位于第 1 行:
ORA-00904: 無效列名
- select "zip" from stores;
- zip
- -----
- 98056
- 92789
- 96745
- 98014
- 90019
- 89076
已選擇6行,用SQL Navigator或Toad看從Oracle SQL Server轉(zhuǎn)移到ORACLE里的表的建表語句為:
- CREATE TABLE stores
- ("stor_id" CHAR(4) NOT NULL,
- "stor_name" VARCHAR2(40),
- "stor_address" VARCHAR2(40),
- "city" VARCHAR2(20),
- "state" CHAR(2),
- "zip" CHAR(5))
- PCTFREE 10
- PCTUSED 40
- INITRANS 1
- MAXTRANS 255
- TABLESPACE users
- STORAGE (
- INITIAL 131072
- NEXT 131072
- PCTINCREASE 0
- MINEXTENTS 1
- MAXEXTENTS 2147483645
- )
總結(jié):
Windows下Oracle9i網(wǎng)關(guān)服務(wù)器在$Oracle9i_HOMEtg4msqladmin目錄下的initsqlserver_databaseid.ora。Windows下Oracle9i網(wǎng)關(guān)服務(wù)器listener.ora里面：
- (SID_DESC=
- (SID_NAME=sqlserver_databaseid)
- (ORACLE_HOME=d:OracleOra92)
- (PROGRAM=tg4msql)
- )
UNIX或WINDOWS下ORACLE8I,ORACLE9I服務(wù)器tnsnames.ora里面
- northwind =
- (DESCRIPTION =
- (ADDRESS_LIST =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.2)(PORT = 1521))
- )
- (CONNECT_DATA =
- (SID = sqlserver_databaseid)
- )
- (HS = sqlserver_databaseid)
- )
需要sqlserver_databaseid一致才行。2007-11-14 來自：xuejinyoulan [收藏到我的網(wǎng)摘]
本文標題：OracleSQLServer設(shè)置訪問多個數(shù)據(jù)庫的方案
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