How can Oracle access views from other databases?

2 years ago
Noah Thompson
2 minutes

There are two common methods for accessing views from other databases in Oracle.

  1. To use a Database Link: you can access objects in other databases, such as tables and views, by creating a database link. Begin by creating a database link in the current database pointing to the database you want to access, allowing you to query objects from that database in the current database. Here are the specific steps to follow:
  1. Establish a database connection in the current database.
CREATE DATABASE LINK remote_db
CONNECT TO username IDENTIFIED BY password
USING 'remote_db_tns_name';

Here, remote_db is the name of the connection, username and password are the username and password for accessing the database, and remote_db_tns_name is the TNS name of the database to be accessed.

  1. Retrieve views from other databases by using database links.
SELECT * FROM view_name@remote_db;

The view_name here is the name of a view in another database.

  1. – Utilize Global Object Name: You can directly access objects in other databases in a query statement using a global table name without the need to create a database link. The specific steps are as follows:
  1. Query views in other databases using fully qualified table names.
SELECT * FROM remote_db.view_name;

The database name remote_db and the view name view_name are of other databases that need to be accessed.

It is important to note that accessing views from other databases requires ensuring that the current user has sufficient permissions to access those databases, and the targeted database needs to have the corresponding permissions enabled.

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