TNS error - basics question

Question

Oracle 9i
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I have created a db_link pointing to another database. However, I am getting a TNS error when I try to connect. I have made sure that the TNS entry that I have put on my machine is correct/
If I create a db_link pointing to another database, do I have to setup a TNSNames entry on my machine? Or, the TNSNames entry should be on the host machine where the database is residing?

Answer 1

Hi,
>>I am getting a TNS error when I try to connect
Which ORA- error are you getting?
>>Or, the TNSNames entry should be on the host machine where the database is residing?
As comascio said before, you need to create a TNS service name that points to the target database and use it in your database link object:
create database link <db_link_name> connect to <user> identified by <pass>  using '<service_name>';On the other hand, you can also create a database link without using a TNS service name, but directly using the connection descriptor on it:
create database link <db_link_name>
        connect to <user> identified by <password>
        using '(description = (address = (protocol = tcp) (host = <host_name>)(port = 1521))
               (connect_data = (sid = <database_sid>)))';Cheers
Legatti