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Oracle
select n,
case
when p is NULL then 'Root'
when n in (select p from bst) then 'Inner'
when n !=any (select p from bst) then 'Leaf'
end statu
from bst
order by n;
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Binary Tree Nodes
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Oracle select n, case
when p is NULL then 'Root' when n in (select p from bst) then 'Inner' when n !=any (select p from bst) then 'Leaf' end statu from bst order by n;