How do I get access to the database installed on a local computer connected to the Internet? Do I know only the local computer IP address that is on local network? Do I know the other parameters? Thanks
You need to now your WAN IP address, because that's where you need to connect to.
Then you need to configure the router so that the port where the MYSQL server listens on (usually 3306) will be forwarded to the local computer's IP address.