Oracle Database Links: Connect Tables Across DBs

1 year ago
Emily Johnson
1 minute

In Oracle, you can use database links to connect tables from two different databases. A database link is a connection that points to another database, allowing access to objects in one database from another.

To create a database connection, you can use the following syntax:

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

In this context, link_name refers to the name of the database connection, while username and password are the credentials needed to connect to another database. The connect_string includes the connection information for the database, such as the host name, port number, and database name.

After establishing the database connection, you can access tables from another database by using link_name in your SQL queries, for example:

SELECT * FROM table_name@link_name;

This allows you to access tables from another database within the current database. Database links can be used in queries to perform join operations and other related queries.

bannerAds