How to enable dblink on oracle

To enable DB Link in Oracle: Create DB Link and specify connection information. Grant the local database user permissions for remote database objects. Test DB Link to verify that the connection is successful.

How to enable DB Link in Oracle

DB Link is a feature in Oracle databases that allows one database to access objects in another database. The steps to enable DB Link are as follows:

1. Create DB Link

 <code class="sql">CREATE DATABASE LINK <link_name> CONNECT TO <user> IDENTIFIED BY <password> USING '<net_service_name>';</net_service_name></password></user></link_name></code>

in:

• <link_name></link_name> is the name of DB Link.
• <user></user> is the user name connected to the remote database.
• <password></password> is the password to connect to the remote database.
• <net_service_name></net_service_name> is the Net service name of the remote database.

2. Grant permissions in the local database

Objects (such as tables, views, and procedures) in the remote database must be granted to the local database user. This can be achieved by following statements:

 <code class="sql">GRANT SELECT ON <remote_table> TO <local_user>;</local_user></remote_table></code>

in:

• <remote_table></remote_table> is the table name in the remote database.
• <local_user></local_user> is the user in the local database.

3. Test DB Link

After creating and granting permissions, you can test the DB Link with the following statement:

 <code class="sql">SELECT * FROM <link_name>.<remote_table>;</remote_table></link_name></code>

If the query is successful, it means that DB Link has been successfully enabled.

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