I don't even disagree with you here. It's something I've said in the past about things like algorithms. Sometimes knowing a surface level thing allows you to utilise it without necessarily needing to know the implementation level details.
But you did not LEARN Relational Algebra. You learned OF relational algebra. And there's a pretty stark difference there.
But you did not LEARN Relational Algebra. You learned OF relational algebra. And there's a pretty stark difference there.