SQL Coding Interview Questions| Binary Tree Nodes HackerRank full solution with various approaches

In this video we will discuss SQL Coding Interview Questions asked in Live Interviews by various companies during their hiring process and we will also see the approach to solve them.

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[sayandbhattacharya]

Basically
/*
root is the one which has no parent, hence P is null
leaf is the one which is not a parent, hence N not in (where P is not null)
inner has to be the one which is a parent but not root, hence all parents except root
*/