Google bigquery Bigquery Stackoverflow-按类别查询已关闭的问题 背景信息

如前所述，StackOverflow问题可能由于以下几个原因而被关闭，即重复…，因为…，需要细节或清晰，需要更多的关注点和基于观点

查询在Google云平台上的公共StackOverflow Bigquery上执行。 此Bigquery包含POST_问题和投票，第一个包含所有问题，第二个包含对这些问题的投票

发布问题模式：

身份证件 标题 身体 已接受\u答案\u id 答覆 评论与计数 ... 例如，[howto]查询由于重复而关闭的问题

您应该使用PostHistory表

PostHistoryTypeId

• 10=关闭后-投票后关闭

评论：此字段将包含编辑帖子的用户的评论。如果PostHistoryTypeId=10，则此字段包含关闭原因的CloseReasonId

• 1=完全重复
• 101=重复

最后，查询是

SELECT q.id, CONCAT('https://stackoverflow.com/questions/', CAST(q.id as STRING)) as url,
FROM `bigquery-public-data.stackoverflow.posts_questions` AS q
JOIN `bigquery-public-data.stackoverflow.post_history` AS h
  ON q.id = h.post_id
WHERE h.post_history_type_id = 10
AND h.comment in ('1', '101')
GROUP BY q.id   

我的问题是，是否可以根据投票结束的原因查询投票结束的问题

有输出

SELECT CASE 
    WHEN comment IN ('1', '101') THEN 'Duplicate'
    WHEN comment = '102' THEN 'Off-topic'
    WHEN comment = '3' THEN 'Subjective and argumentative'
    WHEN comment = '4' THEN 'Not a real question'
    WHEN comment = '7' THEN 'Too localized'
    WHEN comment = '10' THEN 'General reference'
    WHEN comment = '20' THEN 'Noise or pointless (Meta sites only)'
    WHEN comment = '103' THEN '''Unclear what you're asking'''
    WHEN comment = '104' THEN 'Too broad'
    WHEN comment = '105' THEN 'Primarily opinion-based'
    ELSE 'Unknown'
  END close_reason,
  COUNT(DISTINCT q.id) cloased_posts
FROM `bigquery-public-data.stackoverflow.posts_questions` AS q
JOIN `bigquery-public-data.stackoverflow.post_history` AS h
  ON q.id = h.post_id
WHERE h.post_history_type_id = 10
GROUP BY close_reason
ORDER BY cloased_posts DESC