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プログラマーとプログラミングに熱心な人々のための質問と回答

SELECT
CAST(DATEPART(year, Posts.CreationDate) AS VARCHAR(4)) + '-' +
CAST(DATEPART(month, Posts.CreationDate) AS VARCHAR(2)) as month_year,
    count(*) AS tagcount
FROM Posts
    INNER JOIN PostTags ON PostTags.PostId = Posts.id
    INNER JOIN Tags     ON Tags.id         = PostTags.TagId
WHERE
    Tags.tagname='redis' AND
    datepart(year,  Posts.CreationDate) IN (2010, 2011, 2012)
    GROUP BY DATEPART(year, Posts.CreationDate), DATEPART(month, Posts.CreationDate)
    ORDER BY DATEPART(year, Posts.CreationDate), DATEPART(month, Posts.CreationDate)

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edited jul 23 12

created jul 2 12 p1niu