oracle 10g 12514错误

                                                oracle 10g 12514错误

ORA-12514: TNS:listener does not currently know of service requested in connect
处理办法:
在 /opt/oracle/product/10.2.0/db_1/network/admin/listener.ora
中添加
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (SID_NAME = ATYU30)
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = oracle01)(PORT = 1521))
    )
  )

先启动数据库，然后你在CMD命令行中输入：sqlplus / as sysdba
进去后执行：alter system register;
然后再用pl/sql登录试试

或者

# listener.ora Network Configuration File: D:\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 = D:\oracle\product\10.2.0\db_1)
      (PROGRAM = extproc)
    )
   (SID_DESC =
      (GLOBAL_DBNAME = jqdb)
      (ORACLE_HOME = d:\oracle\product\10.2.0\db_1)
      (SID_NAME = jqdb)
    )

  )

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