What is the best to load a treeview from a database where it goes 4 deep

Code:
Parent
    child
    child
        grandchild
        grandchild
    child
    child
        grandchild
            great grandhcild
        grandchild
How would that look in a database? and then how would you load the tree. I can load everything up to the grandchild, but as soon as I load the great grandchild I start having issues. So I am thinking it is the way they are in the database.

Anybody have any examples they can share?