Local에서 Test를 해야되서 깔아서 사용중인데요.. 

TNS : 리스너가 현재 접속 기술자에 요청된 서비스를 알지 못합니다. 

라고 뜨더라구요.. 

찾아보니 .ora의 문제라고 하는데요..  Host도 잘 써줬고 . .. Port 도 잘 확인했는데  SID  = Gw 으로 잘 설정도 해주었구요.. 

뭐가 문제인지 모르겠습니다.. 

.ora 세개를올려드리겠습니다. 

tnsnames.ora

# Generated by Oracle configuration tools.

GW =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = Gw)

    )

  )

ORACLR_CONNECTION_DATA =

  (DESCRIPTION =

    (ADDRESS_LIST =

      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

    )

    (CONNECT_DATA =

      (SID = CLRExtProc)

      (PRESENTATION = RO)

    )

  )

==============================================================

listener.ora

# Generated by Oracle configuration tools.

SID_LIST_LISTENER =

  (SID_LIST =

    (SID_DESC =

      (SID_NAME = Gw)

      (ORACLE_HOME = c:\app\Administrator\product\11.2.0\dbhome_1)

      (ENVS = "EXTPROC_DLLS=ONLY:c:\app\Administrator\product\11.2.0\dbhome_1\bin\oraclr11.dll")

    )

  )

LISTENER =

  (DESCRIPTION_LIST =

    (DESCRIPTION =

      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

      (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))

    )

  )

ADR_BASE_LISTENER = c:\app\Administrator

==========================================================

sqlnet.ora

# Generated by Oracle configuration tools.

# This file is actually generated by netca. But if customers choose to 

# install "Software Only", this file wont exist and without the native 

# authentication, they will not be able to connect to the database on NT.

SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

==============================================================

이렇게 세가지 인데요.. 어느게 잘모되었는지 알수있을까요..ㅠ