di ORACLE_HOME/ network/admin/ biasanya ORACLE_HOME itu tmpat oracle diinstall 
misal C:\oracle\product\bla... nah misal saia ada di 
D:\oracle\ora11\Network\Admin ..

di folder trsbut ada tnsnames.ora nah buka deh pake notepad
biasanya ada isi bgini :

Nama_Alias =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = Lokasi_server_IP_or_PCName )(PORT = 
1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = Nama_Service_Database)
    )
  )

nah k'lo bisa coba pake cmd -> dos
C:\> tnsping Nama_Alias --> bwat cheeck koneksi
C:\> sqlplus "sys/passw...@nama_alias as sysdba"  -> test log-in

gud luck then....

--- On Wed, 4/14/10, Anthony Kurniawan <[email protected]> wrote:

From: Anthony Kurniawan <[email protected]>
Subject: Re: [indo-oracle] ERROR - ORA-12514: TNS:listener does not currently 
know of service requested in connect descriptor
To: [email protected]
Date: Wednesday, April 14, 2010, 8:08 AM







 



  


    
      
      
      Yup benar kata Pak Freddie,

minta diiattach or copy-paste isi dari listener.ora n tnsnames.ora (by default 
terletak di ORACLE_HOME/ network/admin/ ) 



coba lihat melalui netManager, lalu coba lihat listening locations dan database 
services nya, apakah sudah mengarah ke target database yang tepat..



CMIIW..



"Gapailah cita-citamu setinggi langit karena jika kau meleset sekalipun, kau 
akan tetap berada diantara bintang-bintang"   



--- Pada Sen, 12/4/10, Freddie Tanuwijaya <synar_0...@yahoo. com> menulis:



Dari: Freddie Tanuwijaya <synar_0...@yahoo. com>

Judul: Re: [indo-oracle] ERROR - ORA-12514: TNS:listener does not currently 
know of service requested in connect descriptor

Kepada: indo-oracle@ yahoogroups. com

Tanggal: Senin, 12 April, 2010, 8:15 PM



 



Bisa tolong disertkan listener.ora, tnsnames.ora nya juga



____________ _________ _________ __



From: Febry Ginanjar Koestiwandhana <febry_mj03@ yahoo. com>



To: indo-oracle@ yahoogroups. com



Sent: Sun, April 11, 2010 3:10:07 PM



Subject: [indo-oracle] ERROR - ORA-12514: TNS:listener does not currently know 
of service requested in connect descriptor



dear Para Master Oracle



saya benar2 Newbie di Oracle



saya mau melakukan query di isql*plus, setelah masuk pada halaman login saya 
memasukkan 



username : sys



Password : ******



connect identifier : orcl



lalu muncul error 



ERROR - ORA-12514: TNS:listener does not currently know of service requested in 
connect descriptor



kira2 apa yang salah dan apa yang harus lakukan ya??



mohon bantuannya ya.. karena saya benar2 newbie nih di oracle



NB : OS win xp SP2 , Oracle 10g 



Regards 



Febry



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