What are examples of database architecture in which each user has a separate database?

Question

MySQL

I'm going to start working on a service for learning foreign languages.
Each user will have their own dictionary and some other data.
Each user has a separate small database, with a maximum of 200,000 entries.
How can this be implemented? Is it ok to create thousands of databases in mysql or should I use something else?

Answer 1

It is necessary that each user has a separate database.

There is no connection between the proposals, much less a causal one.
To begin with, answer for what reasons you decided to discard the usual normal form (this is a technical term) with the addition of fields with reference to the owner to the entities.

Answer 2

There are no such architectures. Because NOT WANTED.
Except perhaps for considerations of top-secrecy of each user's data, when the security service of your enterprise will fundamentally insist on the separation of databases.
Regularly, this is done simply by an additional field - the user ID - all data is filtered by it when issued to the user from tables common to all. It is impossible to get foreign data.