LeetCode 2072 Amazon Interview SQL Question with Detailed Explanation | Practice SQL

In this video I solve and explain a leetcode SQL question using MySQL query. This question has been asked in Apple, Facebook, Amazon, Google, Adobe, Microsoft, Adobe interviews or what we popularly call FAANG interviews.
I explain the related concept as well. This question includes points to keep in mind to develop SQL queries.

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[mickyman]

SELECT
CASE
WHEN (SELECT SUM(CASE WHEN score >= 90 THEN 1 ELSE 0 END) FROM NewYork) > (SELECT SUM(CASE WHEN score >= 90 THEN 1 ELSE 0 END) FROM California) THEN 'New York University'
WHEN (SELECT SUM(CASE WHEN score >= 90 THEN 1 ELSE 0 END) FROM NewYork) < (SELECT SUM(CASE WHEN score >= 90 THEN 1 ELSE 0 END) FROM California) THEN 'California University'
ELSE 'No Winner'
END AS result;