sql join查询以按国家/地区获取最常查看的文章

Question

很难根据用户的国家/地区视图提取文章

我有以下表格及其字段

user: id, country_id
article: id
article_views: id, user_id, article_id

每次用户查看文章时，我都会将其插入到article_views表中，如下所示：

article_views.id   article_id   user_id
2                  1            1   
3                  2            1   
4                  2            2   
5                  2            2   

我想为当前的user.country_id提取浏览量最高的文章。我想它会包含：

order by article_views.article_id DESC

有什么建议吗？

Answer 1

这应该可以正常工作：

select article_id, count(*) as views
from article_views inner join user on article_views.user_id = user.id
group by user.country_id
order by views desc;

编辑。我忘了将article_id分组为@Josien指出，正确的查询是：

select country_id, article_id, count(*) as views
from article_views inner join user on article_views.user_id = user.id
where country_id = ':countryID'
group by user.country_id, article_id
order by views desc;

Answer 2

select av.id, count(*) as views
from article_views av inner join user u on av.user_id = u.id
where u.country_id = 'cc'
group by u.country_id
order by views desc;