Question

我想像这样通过application_number收集数据。实际的申请号是CN 201510747352。

SELECT c.application_number AS Pub, COUNT(p.publication_number) AS CitedBy 
     FROM `patents-public-data.patents.publications` AS p, UNNEST(citation) AS c 
     WHERE c.application_number IN ('CN-201510747352-A') 
     GROUP BY c.application_number

但是它不起作用。网址是专利页面。谁能帮我一个忙？ https://patents.google.com/patent/CN105233911B/zh?oq=CN201510747352.8

Answer 1

我的猜测是，专利可以在其状态为“申请”后才被引用-因此，当状态为“申请”时，您应该使用应用程序/发布号，而不是使用初始编号CN-201510747352-另外，您不仅需要申请不同的计数而且还排除了使用-A或-B或类似后缀来计数相同的应用程序-这就是为什么您会看到使用regex_extract函数

的原因

#standardSQL
SELECT 
  c.publication_number AS Pub, 
  COUNT(DISTINCT REGEXP_EXTRACT(p.publication_number, r'(.+-.+)-')) AS CitedByCount
FROM `patents-public-data.patents.publications` AS p, 
UNNEST(citation) AS c 
WHERE c.publication_number LIKE ('CN-105233911%') 
GROUP BY c.publication_number

有结果

Row Pub             CitedBy  
1   CN-105233911-A  10

...如果我只有应用程序数据，该如何实现？

#standardSQL
SELECT 
  c.publication_number AS Pub, 
  COUNT(DISTINCT REGEXP_EXTRACT(p.publication_number, r'(.+-.+)-')) AS CitedByCount
FROM `patents-public-data.patents.publications` AS p, 
UNNEST(citation) AS c 
WHERE c.publication_number IN (
  SELECT publication_number 
  FROM `patents-public-data.patents.publications`
  WHERE application_number IN ('CN-201510747352-A') 
)
GROUP BY c.publication_number

通过应用程序从BigQuery获取专利的正向引用数据

1 个答案: