How do you restart the Oracle database service?

To restart the Oracle database service, you can follow these steps:

1. Log in to the operating system of the database server.
2. Open the command line interface and enter the following command to stop the Oracle database service:

sqlplus / as sysdba
shutdown immediate;

1. Please wait for the database to fully close before entering the following command to start the Oracle database service.

startup;

1. After waiting for the database to fully start, you can use the following command to verify if the database has started properly:

select status from v$instance;

By following these steps, you can successfully restart the Oracle database service. If you have any other issues or need further assistance, please let me know at any time.