sql - 使结果包含申请号或通过结果中的公开号查询申请号

Question

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

我可以使用申请号来获取 CitedBy，但结果是 Pub 和 CitedBy。我如何才能实现结果包含申请号和 CitedBy 的目的。

Answer 1

也许你不想要group by?

select c.publication_number as Pub, 
       regexp_extract(p.publication_number, r'(.+-.+)-')) as cited_by
from `patents-public-data.patents.publications` p cross join 
     unnest(citation) c 
where c.publication_number in (select publication_number 
                               from `patents-public-data.patents.publications`
                               where application_number in ('CN-201510747352-A') 
                              );

或者，您可以将它们聚合到一个数组中：

select c.publication_number as Pub, 
       array_agg(distinct regexp_extract(p.publication_number, r'(.+-.+)-'))) as cited_bys
from `patents-public-data.patents.publications` p cross join 
     unnest(citation) 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;