SANGKRIT.net not only offers you Managed and Fully Managed servers but it also lets you subscribe self-managed server option which is only recommended for command line experts. Because self-managed servers are without a control panel such as cPanel, Plesk, or Simple Control Panel.
These self-managed servers do not have phpMyAdmin installed which is used for managing MySQL databases. So in order to manage databases, you are required to use the SSH command line to import .SQL backup files.
This post guides you through importing MySQL databases via SSH.