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Q&A for professionals in medical and allied health fields, students of those professions, related academics, and others with a sound understanding of medicine and healthcare-related sciences

SELECT date1, count(id) as cnt
FROM (

  SELECT 
    FORMAT (d.CreationDate, 'yy-MM') as [date1],
    (d.Id) as id
  FROM Posts d  -- d=duplicate
    LEFT JOIN PostHistory ph ON ph.PostId = d.Id
    LEFT JOIN PostLinks pl ON pl.PostId = d.Id
    LEFT JOIN Posts o ON o.Id = pl.RelatedPostId  -- o=original
  WHERE
    d.PostTypeId = 1  -- 1=Question
    
  ) as t1
group by date1
order by date1

fork query

edited jul 9 19

created jul 9 19 Moradnejad