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SELECT COUNT(DISTINCT OwnerUserId) FROM Posts;

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Drones and Model Aircraft Meta

Q&A for experienced flyers, pilots, and builders of drones and model aircraft

-- 전체 사용자 수와 posting이 한개라도 있는 사용자 수의 비율을 계산
-- SELECT COUNT(*) FROM Users;
SELECT COUNT(DISTINCT OwnerUserId) FROM Posts;
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