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SELECT N, CASE WHEN P IS NULL THEN 'Root' WHEN N IN (SELECT DISTINCT P FROM BST) THEN 'Inner' ELSE 'Leaf' END AS TYPE FROM BST ORDER BY N;
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Binary Tree Nodes
You are viewing a single comment's thread. Return to all comments →
SELECT N, CASE WHEN P IS NULL THEN 'Root' WHEN N IN (SELECT DISTINCT P FROM BST) THEN 'Inner' ELSE 'Leaf' END AS TYPE FROM BST ORDER BY N;