ORA-12528: TNS: 监听程序: 所有适用例程都无法建立新连

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = D:\oracle\product\10.1.0\db_1)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = orcl) //如果已经有这个orcl了，这个文件就不用修改
      (ORACLE_HOME = D:\oracle\product\10.1.0\db_1) //这里要根据你的实际路径来
      (SID_NAME = orcl)
    )
  )
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = lypch )(PORT = 1521))
      )
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
      )
    )
  )

2、通过修改的参数,红色表注部分
# Network Configuration File: D:\oracle\product\10.1.0\db_1
\network\admin\
# Generated by Oracle configuration tools.
AMMICLY =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = lypch )(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
      (UR=A) //加上这个，不知道是什么意思
    )
  )
EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )
3、然后 sqlplus /nolog
SQL>alter database mount;
SQL>alter database open;