oracle10g客户端连接oracle9i数据库，Net Manager配置

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概要文件：命名方法选择：TNSNAMES

服务命名：创建-下一步到第4页，选择（oracle8或更低版本）SID，输入数据库名比如ecoradb

??????????????? （说了是oracle9i数据库，为什么要选择这个呢，说不通啊，可事实上就是选择这个，如果不选择这个，pl/sql 连接数据库的时候会报 ORA-12154: TNS: 无法解析指定的连接标识符 的错误）

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原来tnsnames.ora 的格式如下

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12.2.26.123 =??
? (DESCRIPTION =??
??? (ADDRESS_LIST =??
????? (ADDRESS = (PROTOCOL = TCP)(HOST = 12.2.26.123)(PORT = 1521))??
??? )??
??? (CONNECT_DATA =??
????? (SERVICE_NAME= ecoradb)??
??? )??
? )

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最后tnsnames.ora 的格式如下：

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12.2.26.123 =
? (DESCRIPTION =
??? (ADDRESS_LIST =
????? (ADDRESS = (PROTOCOL = TCP)(HOST = 12.2.26.123)(PORT = 1521))
??? )
??? (CONNECT_DATA =
????? (SID = ecoradb)
??? )
? )

?区别仅仅在于service_name 改成了sid

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完整配置参考如下：

# tnsnames.ora Network Configuration File: D:\oracle\product\10.2.0\client_1\NETWORK\ADMIN\tnsnames.ora
# Generated by Oracle configuration tools.

12.2.26.123 =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 12.2.26.123)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SID = ecoradb)
    )
  )

ECORADB =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 12.2.26.123)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SID = ecoradb)
    )
  )

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