lr18-6

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Earth Science

Q&A for those interested in the geology, meteorology, oceanography, and environmental sciences

SELECT DisplayName
FROM (SELECT OwnerUserId, count(*) c
	FROM Posts
	GROUP BY OwnerUserId) t
JOIN Users ON (t.OwnerUserId=Users.Id)
WHERE (Users.Location='Россия' OR Users.Location='Russia') AND t.c > ALL (SELECT c2
	FROM (SELECT OwnerUserId, count(*) c2
		FROM Posts
		GROUP BY OwnerUserId) t2
	JOIN Users ON (t2.OwnerUserId=Users.Id)
	WHERE (Users.Location='Polska' OR Users.Location='Poland'));

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