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我正在尝试使用Visual Studio 2010中的服务器资源管理器连接我的本地Oracle 11g数据库.我尝试按照说明设置所有内容,但我仍然收到ORA-12504错误.

这是错误:

这是我的tnsnames.ora内容:

# tnsnames.ora Network Configuration File: C:\app\rsahi\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.


VENUS =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = SPRPRG020)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = VENUS)
    )
  )

LISTENER_VENUS =
  (ADDRESS = (PROTOCOL = TCP)(HOST = SPRPRG020)(PORT = 1521))

listener.ora文件内容,

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

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = …