How to restrict a column value in SQLite / MySQL

Question

I would like to restrict a column value in a SQL table. For example, the column values can only be \"car\" or \"bike\" or \"van\". My question is how do you achieve this in

Answer 1

Add a new table containing these means of transport, and make your column a foreign key to that table. New means of transport can be added to the table in future, and your column definition remains the same.

With this construction, I would definitively choose to regulate this at the DB level, rather than that of the application.