我们在社区中使用此查询来查看过去 30 天内最活跃的用户。
SELECT
u.username,
COUNT(c.*) AS cnt
FROM
chat_messages AS c
LEFT JOIN users AS u ON c.user_id = u.id
WHERE c.created_at >= CURRENT_TIMESTAMP - INTERVAL '30 days'
GROUP BY u.username
ORDER BY cnt DESC
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