I want to know how to set the DB of WordPress.

I understand that you can set the DB in wp-config.php in WordPress. What I'm curious about is that I don't know how to write DB_HOST below.

e.g.) When you set up a host for a local DB server inside the company called [192.168.1.8] on the web server of [202.111.11], Set it as below.

//202.111.111 Set up a local DB server inside the company from the web server
define('DB_HOST', '192.168.1.8'); 

If I have to set up a DB outside of local in the above situation, How do I write if I need to set up a local DB through a web server as shown below?

define ("DB_HOST", "202.111.111/192.168.1.8"); 

Please teach me. I beg you.