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by
Jean-Frédéric
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SET @cat = "Media_supported_by_Wikimedia_France", @t1 = 20131001000000, @t2 = 20140101000000; SELECT /* SLOW_OK */ COUNT(page.page_title) FROM image CROSS JOIN page ON image.img_name = page.page_title CROSS JOIN categorylinks ON page.page_id = categorylinks.cl_from LEFT JOIN oldimage ON image.img_name = oldimage.oi_name AND oldimage.oi_timestamp = (SELECT MIN(o.oi_timestamp) FROM oldimage o WHERE o.oi_name = image.img_name) WHERE categorylinks.cl_to = @cat AND IF(oldimage.oi_timestamp IS NULL, img_timestamp, oldimage.oi_timestamp) BETWEEN @t1 AND @t2 ORDER BY img_timestamp ASC;
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