SQL QuestSQL Interview Questions › Aggregation & Grouping

Consistent Director Analysis

MediumFreeQuerying BasicsAggregation & GroupingSubqueries & CTEs

Find directors with 3 or more movies. Show exactly these 5 columns, in this order: director, movie_count, avg_rating (2 dec), best_film (title of their highest-rated movie — use a correlated subquery), total_runtime_hours (SUM of runtime / 60.0, 1 dec). Sort by avg_rating descending.

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Schema

movies

idtitleyeargenreratingvotesrevenue_millionsruntimedirector
1Guardians of the Galaxy2014Action8.1757074333.13121James Gunn
2Prometheus2012Adventure7485820126.46124Ridley Scott
3Split2016Horror7.3157606138.12117M. Night Shyamalan

Expected output: Prolific directors with correlated best-film lookup

Hint

Correlated subquery: (SELECT title FROM movies m2 WHERE m2.director = m.director ORDER BY rating DESC LIMIT 1). Use GROUP BY on outer alias m

Concepts

SELECT GROUP BY HAVING Aggregation Subquery

Practise the topic: SQL practice questions · GROUP BY exercises · CTE practice

In these company practice sets

Google · Snowflake

A SQL Quest challenge matched to patterns reported for these companies — not a question any of them has published.

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