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Conditional Counting with CASE
For each movie genre, count how many movies are hits (revenue > $100M), moderate ($10M-$100M), and flops (< $10M). Show genre, hits, moderate, flops, and total (excluding NULL revenue). Sort by hits descending. This CASE-inside-SUM pattern is the foundation of pivot tables in SQL.
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Schema
movies
| id | title | year | genre | rating | votes | revenue_millions | runtime | director |
|---|---|---|---|---|---|---|---|---|
| 1 | Guardians of the Galaxy | 2014 | Action | 8.1 | 757074 | 333.13 | 121 | James Gunn |
| 2 | Prometheus | 2012 | Adventure | 7 | 485820 | 126.46 | 124 | Ridley Scott |
| 3 | Split | 2016 | Horror | 7.3 | 157606 | 138.12 | 117 | M. Night Shyamalan |
Expected output: Action | 5 | 8 | 2 | 15
Hint
Concepts
SELECT CASE Aggregation GROUP BY BETWEEN Conditional Aggregation
Practise the topic: SQL practice questions · CASE WHEN practice · GROUP BY exercises
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