To import tables and script into a mySQL database, you can use PhpMyAdmin available from your domain control panel.
To import tables and script into a MSSQL database, please use WebDataAdministrator available from your domain control panel.
To use either of above, you need to make a database via your control panel and then login using the database user and password.
Should you face difficulty or are unable to do the above, you may create the database, user, password and upload the sql file to domain root & raise a support ticket, we will populate your db with the sql file. (please mention all domain and account details to authenticate you as owner of domain.)