Oracle Database Links
A database link (dblink) links databases. It allows you to query against other databases using the syntax TABLENAME@DBLINK.
Use the following code to create a database link:
create database link "database_link_name" connect to username identified by "password" using 'connection_name';
The values you need to plugin are:
- database_link_name the name you want to give your database link and what you enter after the @ in TABLENAME@DBLINK
- username the username to connect to connect to the database
- password the password for the username to connect to the database
- connect_name the TNS or full domain name to uniquely identify the database connection
Important tips:
- You need to create a new connection to test the database link - it won't work in the same connection used to create the database link.
- If you get a TNS error, ensure that TNSNAMES.ORA is up to date on the database server you are creating the link on.