What is a self join for? (in english)

Question

I already know what a self-join does. Thank you, I also read all the other computerised operational descriptions on stack overflow, so I know this is not actually a

Answer 1

The reason why the employee-manager example is so common, is because it hits the nail on the head. A self join on a table looks for pairs of rows, like any join, but with both rows coming from the same table. Nothing special really.