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Q&A for active researchers, academics and students of physics

--@Merlin we want to know the percentage of questions which are:
--unanswered, that are not closed or wiki.
--low rep users (i.e < 12) have an up voted answer but no accepted answer
--percentage of unanswered questions by asker's reputation

WITH TaggedPosts(PostId)
AS (
  SELECT pt.PostId as PostId
  FROM PostTags pt INNER JOIN Tags t ON t.Id=pt.TagId
  WHERE t.TagName LIKE '%' + ##tag:string## + '%'
  GROUP BY pt.PostId
)

SELECT count(p.Id)
FROM TaggedPosts tp INNER JOIN Posts p ON p.Id=tp.PostId
WHERE
    PostTypeId = 2
AND
    AcceptedAnswerId IS NULL
AND
    AnswerCount > 0

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edited jul 13 12

created jul 13 12 Merlin