Database link from 11g to 10g

Question

I am trying to create a database link from the 11g database to the 10g database using:
create database link ORCL10R2 connect to <username10g> identified by <password10g> using <db10g>;
It Returns
Database link created.
select sysdate from dual@ORCL10R2 returns error:
ERROR at line 1:
ORA-12504: TNS:listener was not given the SERVICE_NAME in CONNECT_DATA
Please let me know what changes I need to make to tnsnames and listener at both servers.

Answer 1

11g database: 10.1.1.10
10g database: 10.1.1.12
TNSNAMES.ORA at 10.1.1.10
XYZ =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.1.1.10)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XYZ)
LISTENER.ORA at 10.1.1.10
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.1.1.10)(PORT = 1521))
what needs to be modified here?
Edited by: 944558 on 5 Jul, 2012 12:27 AM