Link from Oracle DB server to Oracle DB server

Question

Hi,
I need some help how to link oracle db server A to Oracle db server B. It is so difficult to set it up. I kept getting error 'Could not resolve the connect identified...'
when I execute this query statement that links to B server: select COUNT(*) from [email protected]
I am currently on server A and here is the information server of server B.
Server B
DB Name: 'SafeStaging'
Domain: 'us.mycomp.com'
global Name: true
Name of db link: SAFESTAGING.US.MYCOMP.COM
From the query screen, I used the query syntax to establish the link as following:
create database link SAFESTAGING.US.MYCOMP.COM
connect to "login" identified by "password"
using 'service_staging'
In the TNSNAMES.ORA file on the server desktop, I also add these lines
service_staging =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = ###.###.#.##)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME =SAFESTAGING.US.MYCOMP.COM)
select COUNT(*) from [email protected] --> get error: 'Could not resolve the connect identified...'

Answer 1

Thanks for the reply. But, the issue is not resolved. I still get error: 'Could not resolve the connect identifier specified'
The TNSNAMES.ORA contains this information
QSAFESTG.US.MyComp.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = ###.##.###.##)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = qsafestg)
Oracle uses this information to connect this db server is fine from the UI.  But, the issue when I create the database link.
create database link QSAFESTG.US.MyComp.COM connect to "login" identified by "password" using 'qsafestg'
SELECT COUNT(*)
FROM [email protected]
-----> I got an error 'could not resolve the connect identifier specifier'
on DOS command - tnsping qsafestg --> get error: 'Failed to resolve name'. --why it failed?
Then, I tried creating another link
create database link qsafestg connect to "login" identified by "password" using 'qsafestg'
SELECT COUNT(*)
FROM table1@qsafestg
-----> I got an error 'could not resolve the connect identifier specifier'
ON DOS Command: tnsping QSAFESTG.US.MyComp.COM --> Return: OK. (100ms) ?
Why do I keep getting this error: could not resolve the connect identifier specifier