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  1. Prepare
  2. SQL
  3. Advanced Select
  4. Binary Tree Nodes
  5. Discussions

Binary Tree Nodes

  • marinskiy
     + 4 comments

    Here is Oracle solution from my HackerrankPractice repository:

    SELECT N,
    CASE
        WHEN P IS NULL THEN 'Root'
        WHEN N IN (SELECT P FROM BST) THEN 'Inner'
        ELSE 'Leaf'
    END
FROM BST
ORDER BY N;

    Feel free to ask if you have any questions :)