MySQL Tree ordered by parent and child

Question

I\'m trying to display a tree structure in MYSQL with this reference (http://mikehillyer.com/articles/managing-hierarchical-data-in-mysql/) and I\'m seeing that only works w

Answer 1

You need somehow a self join to show the relationship. After ...relations As child_menu you need to add left join relations as r2 on r2.parent_id = child_menu.id...