Here’s the SSH command to import a database backup to a new database.
Navigate to the directory where your database copy resides using SSH.
mysql -uusername -p databasename < backupname.sql
You’ll be prompted for the password for the database. Enter that.
If this is a Magento database, it could take awhile to import. Ours is around 600M, so it took awhile.
That’s it.