SQL for Non-Programmers -- Homework Practice

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プログラマーと熱狂的なプログラマーのためのサイトに関する質問と回答

SELECT DATEPART(weekday, p.CreationDate)
FROM Users u
JOIN Posts p ON p.OwnerUserId = u.Id
WHERE p.CreationDate > DATEADD(day, -364, GETUTCDATE())
AND ABS(DATEDIFF(day, u.CreationDate, p.CreationDate)) < 7
GROUP BY DATEPART(weekday, p.CreationDate)

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