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Why am I getting the ORA-02019 error?

An Oracle user asks why they are getting the ORA-02019 error when trying to create a link between databases.

We have two databases in the network. I want to access a table in the second database user table from the first...

database user. I tried to create a database link to connect to the second database, but I am getting the following error: ORA-02019: connection description for remote database not found.

When you create a database link, you use the following command:

CREATE DATABASE LINK link_name CONNECT TO username IDENTIFIED BY password USING 'tns_entry';

In the above, the USING clause specifies a TNS entry in your TNSNAMES.ORA configuration file. So you have to update your config file. The ORA-2019 error is indicating that the tns entry is not found in this file. And database links always look for the tnsnames.ora config file in the ORACLE_HOME/network/admin directory. So make sure the file exists in this entry and the file is updated.

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