At what point is it worth using a database?

Question

I have a question relating to databases and at what point is worth diving into one. I am primarily an embedded engineer, but I am writing an application using Qt to interfa

Answer 1

You don't need a database if you have a few thousand rows in one or two tables to handle in a single user app (for the embedded point).

If it is for multiple users (concurrent access, locking) or the need of transactions you definitly should consider a database. Handling complex datastructures in normalized tables and maintain integrety, or a huge amount of data would be another indication you should use a database.