How to access a database remotely using PL/SQL?

To access the database remotely, you need to ensure the following steps have been completed:

1. Configure a listener for the database server: In order to accept remote connection requests, you need to configure a listener on the database server. This can be achieved by modifying the listener configuration file (listener.ora).
2. Ensure the network connection is working properly: You need to verify that the network connection from the remote computer to the database server is available. You can use the PING command to test the network connection.
3. Set up a firewall: If there is a firewall on the database server, you will need to open the corresponding ports to allow remote connections.
4. Create a database user and grant authorization: On the database server, establish a database user for remote access and allocate the necessary permissions for accessing the database.

After completing the above steps, you can use tools like PL/SQL Developer to connect to the remote database. In the connection setup, you will need to provide information such as the database server’s hostname or IP address, listener port number, database username, and password.

Once connected to a remote database using PL/SQL Developer, you can write and execute PL/SQL code to access and manipulate data in the database. For example, you can query data using SELECT statements, insert new data using INSERT statements, update existing data using UPDATE statements, and delete data using DELETE statements.