ORA-12505 ORACLE 10G解决方法

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本文介绍了解决Oracle数据库连接监听器错误的方法。通过修改listener.ora文件中的配置，包括SID_LIST_LISTENER和LISTENER部分，使SQL Developer、sqlplus等工具能够成功连接到默认实例ORCL。

什么都对，就突然报这个监听器错误。
sqldevelper也不能连，sqlplus也不能连。
实例是默认的ORCL
解决方法：
\oracle\product\10.2.0\db_1\NETWORK\ADMIN
里的listener.ora


# listener.ora Network Configuration File: E:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = E:\oracle\product\10.2.0\db_1)
      (PROGRAM = extproc)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    )
  )

改成：

# listener.ora Network Configuration File: E:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
       (ORACLE_HOME = E:\oracle\product\10.2.0\db_1)
      (PROGRAM = extproc)
    )

 (SID_DESC =
       (GLOBAL_DBNAME = orcl)
        (ORACLE_HOME = E:\oracle\product\10.2.0\db_1)
       (SID_NAME = orcl)
      )
   )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC)))
      (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)))
    )
  )

别忘了改地址。