How to check dblink in oracle?

2.9K Asked by AdityaYadav in SQL Server , Asked on Oct 3, 2022

The title says it all, is there a way to quickly list all the current database links in oracle?

Something along the same lines as this, which lists the current user's tables:

select * from user_tables;

Answered by Aishwarya Jhadav

The answer to your question - how to check dblink in oracle is -

  SELECT DB_LINK, USERNAME, HOST FROM ALL_DB_LINKS

you can try that, perhaps it can help you solve your problem

Your Answer

Answer (1)

Ranjana

In Oracle, database links (dblinks) allow you to access data from a remote database. To check and manage database links, you can use various dictionary views and commands.

Checking Existing Database Links

Using DBA_DB_LINKS View:

This view contains information about all database links in the database (accessible if you have DBA privileges).

SELECT * FROM DBA_DB_LINKS;

Using ALL_DB_LINKS View:

This view shows information about database links accessible to the current user.

Using USER_DB_LINKS View:

This view shows database links owned by the current user.

SELECT * FROM USER_DB_LINKS;

Example Query

To see the details of database links accessible to the current user, you can execute:

SELECT DB_LINK, USERNAME, HOST, CREATED FROM USER_DB_LINKS;

This will provide the name of the database link, the username used for the connection, the host, and the creation date.

Checking the Status of a Database Link

To check if a database link is working correctly, you can perform a simple query using the dblink.

For example:

  SELECT * FROM dual@your_dblink_name;

Replace your_dblink_name with the name of your database link. If the link is configured correctly, this query should return a result. If there are issues with the link, you will receive an error message indicating the problem.

Creating a New Database Link

If you need to create a new database link, you can use the CREATE DATABASE LINK statement. For example:

  CREATE DATABASE LINK your_dblink_nameCONNECT TO remote_user IDENTIFIED BY remote_passwordUSING 'remote_database_service_name';

Replace your_dblink_name, remote_user, remote_password, and remote_database_service_name with the appropriate values for your environment.

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