Get all parents for a child

Question

I want to retrieve the parentid of an id, if that parentid has a parent again retrieve it, and so on. Kind of hierarchy table.

id----parentid
1-----1
5-----1         


        

Answer 1

Your query is doing recursion but in opposite direction. So if you change starting point to:

where id = 1

then you will have user 1 and all his successors