在PostgreSQL中連接兩個表和一個視圖以獲得所需結果

Question

這是使用查詢創建的視圖：SELECT title，count（*）as views FROM articles a，log l WHERE a.slug = substring（l.path， 10）GROUP BY標題ORDER BY views DESC;

 title | views 
------------------------------------+-------- 
    article-1 | 338647 
    article-2 | 253801 
    article-5 | 170098 
    article-3 | 84906 
    article-8 | 84810 
    article-7 | 84557 
    article-6 | 84504 
    article-4 | 84383 

現在我試圖用這個視圖創建一個查詢，打印出來的文章觀點的總和與標題相關聯的每個作者。下面我重新創建了另外兩個表格的關鍵字段。

AUTHORS 
      name  | id 
---------------------+-------- 
      author-1 | 1 
      author-2 | 2 
      author-3 | 3 
      author-4 | 4 

ARTICLES 
    author  | article 
--------------+-------- 
      1 | article-1 
      2 | article-2 
      1 | article-3 
      4 | article-4 
      1 | article-5 
      1 | article-6 
      3 | article-7 
      2 | article-8 

Answer 1

你會做：

select a.author, sum(v.views) as view 
from yourview v join 
    articles a 
    on v.title = a.article join 
    authors au 
    on a.author = au.id 
group by a.author;