해커랭크 SQL 문제 풀이: Binary Tree Nodes문제링크: https://www.hackerrank.com/challenges/binary-search-tree-1/problem Binary Tree Nodes | HackerRankWrite a query to find the node type of BST ordered by the value of the node.www.hackerrank.comYou are given a table, BST, containing two columns: N and P, where N represents the value of a node in Binary Tree, and P is the parent of N. Write a query to find the ..