Thanks.
I found an SQLite IDE so thats allowed me to create the database and import data etc.
If I upload the database under 'files' in backend services within appery, would this attach the db file to my app then I can try to access it locally as above? I presume its not quite this easy to attach a db, I'm thinking it needs exporting first and attaching later.
But if it is then #whoopwhoopwhoop - I've been wanting to get something like this working for months