Can a foreign key act as a primary key?

Question

I\'m currently designing a database structure for our team\'s project. I have this very question in mind currently: Is it possible to have a foreign key act as a primary key

Answer 1

Yes, there should be no problem. Foreign keys and primary keys are orthogonal to each other, it's fine for a column or a set of columns to be both the primary key for that table (which requires them to be unique) and also to be associated with a primary key / unique constraint in another table.