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LeetCode-Solutions/MySQL/article-views-ii.sql at master · hackto-dev/LeetCode-Solutions · GitHub
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article-views-ii.sql
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#
Time: O(nlogn)
#
Space: O(n)
SELECT DISTINCT
viewer_id
AS
id
FROM
views
GROUP BY viewer_id,
view_date
HAVING
Count
(DISTINCT article_id)
>
1
ORDER BY id
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