Whilst I would mostly agree with that, the general modern definition of database has grown out of the common form of the popular varieties. I don't think that

Whilst I would mostly agree with that, the general modern definition of database has grown out of the common form of the popular varieties. I don't think that something has to have inner-join, select, etc. to be a database, it's just that the most common do. Similarly I don't think something has to have 4 wheels, an internal combustion engine and a sunroof to be car - it's just that most of them do.