【SQL Server数据迁移】64位的机器：SQL Server中查询ORACLE的数据

从SQL Server中查询ORACLE中的数据，可以在SQL Server中创建到ORACLE的链接服务器来实现的，但是根据32位 、64位的机器和软件，需要用不同的驱动程序来实现。

在64位的机器上，通过访问接口：OracleProvide for OLE DB，来实现。

1、机器环境和软件环境

操作系统是：windows 7旗舰版 64位，SQL Server 20008R2  64  位，Oracle 11g 11.2.0.1.0   64 位。

2、ORACLE环境的设置

连接oracle，修改scott用户的密码为tiger，并给账户解锁，尝试登录，查询表：

C:\Users\Administrator>sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on 星期四 3月 13 16:11:03 2014

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

连接到:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> alter user scott identified by tiger;

用户已更改。

SQL> alter user scott account unlock;

用户已更改。

SQL> connect scott/tiger
已连接。
SQL> select count(*) from emp;

  COUNT(*)
----------
        12

查看listener.ora是否正确：

# listener.ora Network Configuration File: D:\app\Administrator\product\11.2.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:\app\Administrator\product\11.2.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\app\Administrator\product\11.2.0\dbhome_1\bin\oraclr11.dll")
    )

    (SID_DESC =
      (GLOBAL_DBNAME=orcl)
      (ORACLE_HOME = D:\app\Administrator\product\11.2.0\dbhome_1)
      (SID_NAME =orcl)
    )
  )

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

要特别注意里面的：

(SID_DESC =

(GLOBAL_DBNAME=orcl)
      (ORACLE_HOME = D:\app\Administrator\product\11.2.0\dbhome_1)
      (SID_NAME =orcl)
)

另外，查看tnsnames.ora是否正确：

# tnsnames.ora Network Configuration File: D:\app\Administrator\product\11.2.0\dbhome_1\NETWORK\ADMIN\tnsnames.ora
# Generated by Oracle configuration tools.

ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )

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

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

特别是：

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

查看监听器的状态是否正常：

SQL> host lsnrctl status

LSNRCTL for 64-bit Windows: Version 11.2.0.1.0 - Production on 13-3月 -2014 16:16:21

Copyright (c) 1991, 2010, Oracle.  All rights reserved.

正在连接到 (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))
LISTENER 的 STATUS
------------------------
别名                      LISTENER
版本                      TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Production
启动日期                  13-3月 -2014 13:17:27
正常运行时间              0 天 2 小时 58 分 58 秒
跟踪级别                  off
安全性                    ON: Local OS Authentication
SNMP                      OFF
监听程序参数文件          D:\app\Administrator\product\11.2.0\dbhome_1\network\admin\listener.ora
监听程序日志文件          d:\app\administrator\diag\tnslsnr\ggg-PC\listener\alert\log.xml
监听端点概要...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
服务摘要..
服务 "CLRExtProc" 包含 1 个实例。
  实例 "CLRExtProc", 状态 UNKNOWN, 包含此服务的 1 个处理程序...
服务 "orcl" 包含 1 个实例。
  实例 "orcl", 状态 UNKNOWN, 包含此服务的 1 个处理程序...
命令执行成功

3、设置链接服务器。

需要特别注意的是，数据源orcl指的是：tnsnames.ora文件中的orcl服务名。

第一步，选择“新建链接服务器”

第二步，一定要选择 Oracle Provide for OLE DB

第三步，输入产品：oracle，数据源：orcl

第四步，输入oracle的用户名和密码，这个需要根据实际情况设置，输入完后，点确定就好。

4、测试查询

select * from openquery(xxx, ‘SELECT * FROM emp‘)

返回结果：

5、用代码实现：

/****** Object:  LinkedServer [ORCL_SCOTT]    Script Date: 03/13/2014 16:25:21 ******/
EXEC master.dbo.sp_addlinkedserver
       @server = N‘ORCL_SCOTT‘,
       @srvproduct=N‘oracle‘,
       @provider=N‘OraOLEDB.Oracle‘,
       @datasrc=N‘orcl‘
GO

 /* For security reasons the linked server remote logins password is changed with ######## */
EXEC master.dbo.sp_addlinkedsrvlogin
       @rmtsrvname=N‘ORCL_SCOTT‘,
       @useself=N‘False‘,
       @locallogin=NULL,
       @rmtuser=N‘scott‘,
       @rmtpassword=‘tiger‘
go

select * from openquery(ORCL_SCOTT, ‘SELECT * FROM scott.emp‘)

还可以用？表示绑定变量：

EXEC ( ‘SELECT * FROM scott.emp‘) AT ORCL_SCOTT;
GO
EXEC ( ‘SELECT * FROM scott.emp WHERE MGR = ?‘, 7902) AT ORCL_SCOTT;
GO

DECLARE @v INT;
SET @v = 7902;
EXEC ( ‘SELECT * FROM scott.emp WHERE MGR = ?‘, @v) AT ORCL_SCOTT;
GO 

6、通过openrowset函数来实现，更简单。

select *
from openrowset(‘OraOLEDB.Oracle‘,‘orcl‘;‘scott‘;‘tiger‘,
                ‘select * from SCOTT.EMP‘)

返回结果：