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Q&A about the site for scholars and enthusiasts of literature

-- Tags with a high proportion of zero-vote accepted answers

SELECT t.TagName
, COUNT(*) AS 'Questions'
, CAST( COUNT(a.id) AS FLOAT ) / COUNT(*) AS 'Zero-Vote AcceptedPercent'
FROM Tags t
LEFT JOIN
     PostTags pt
ON   t.id = pt.TagId
LEFT OUTER JOIN
     Posts p
ON   pt.PostId = p.id
AND  p.AcceptedAnswerId != 0
LEFT JOIN
     Posts a
ON   a.Id = p.AcceptedAnswerId
AND a.Score = 0
GROUP BY t.TagName
HAVING COUNT(*) > 300
ORDER BY 3 DESC

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created feb 8 11 martin clayton