How to create db link in oracle example

How do I create a DB Link?

  1. First, specify the name of the database link after the CREATE DATABASE LINK keywords.
  2. Second, provide user and password of the remote database after the CONNECT TO and IDENTIFIED BY keywords.
  3. Finally, specify the service name of the remote database.

What is database link in Oracle with example?

A database link is a schema object in one database that enables you to access objects on another database. The other database need not be an Oracle Database system. In SQL statements, you can refer to a table or view on the other database by appending @dblink to the table or view name.

How do I find the DB link in Oracle?

These views are helpful for working with DB links in Oracle:
  1. DBA_DB_LINKS – All DB links defined in the database.
  2. ALL_DB_LINKS – All DB links the current user has access to.
  3. USER_DB_LINKS – All DB links owned by current user.

What is private DB Link?

Database links can be public or private. A public database link is one that can be used by any user. A private database link can be used only by the database link’s owner.

How do I drop a DB link in Oracle?

Use the DROP DATABASE LINK statement to remove a database link from the database. A private database link must be in your own schema. To drop a PUBLIC database link, you must have the DROP PUBLIC DATABASE LINK system privilege.

How do I drop a DB Link?

The DROP DATABASE LINK statement can remove a private database link. To remove a public database link, you add the PUBLIC keyword as shown in the following statement: DROP PUBLIC DATABASE LINK dblink; Note that to drop a public database link, you need to have the DROP PUBLIC DATABASE DATABASE LINK system privilege.

How do you check DB Link is working or not?

We can verify public database link using select * from dual@public_db_link; How private db links can be verified by a DBA if application schema’s password is not known.