Mysql 通过一些标准加入

我有一个sql：

SELECT 
     artists.id, 
     actors.id, 
     actors.count 
FROM 
     artists 
INNER JOIN actors ON artists.title = actors.title;

Actors表有重复项和一些

计数器

字段。所以可能会有

Tom Waits | 10
Tom Waits | 30

如何更改我的第一个sql，使其只返回那些获得了

MAX（count）

差不多

SELECT 
     artists.id, 
     actors.id, 
     actors.count 
FROM 
     artists 
INNER JOIN actors ON artists.title = actors.title 
HAVING MAX(actors.count);

怎么样

SELECT  actors.id
        , MAX(actors.count)
FROM    artists 
        INNER JOIN actors ON artists.title = actors.title
GROUP BY
        actors.id        

怎么样

SELECT  actors.id
        , MAX(actors.count)
FROM    artists 
        INNER JOIN actors ON artists.title = actors.title
GROUP BY
        actors.id        

试试这个-

SELECT artists.id, actors.id, actors.`count` FROM artists
  INNER JOIN actors
    ON artists.title = actors.title
  INNER JOIN (
    SELECT title, MAX(`count`) max_count FROM actors
      GROUP BY title
    ) actors2
    ON actors.title = actors2.title AND actors.`count` = actors2.max_count;

试试这个-

SELECT artists.id, actors.id, actors.`count` FROM artists
  INNER JOIN actors
    ON artists.title = actors.title
  INNER JOIN (
    SELECT title, MAX(`count`) max_count FROM actors
      GROUP BY title
    ) actors2
    ON actors.title = actors2.title AND actors.`count` = actors2.max_count;

简单的方法：

SELECT 
  artists.id, 
  (select actors.id 
   from actors 
   where artists.title = actors.title 
   order by actors.count desc Limit 1) 
  as actors_id,
  (select actors.count 
   from actors 
   where artists.title = actors.title 
   order by actors.count desc Limit 1) 
  as actors.count 
FROM 
  artists 
;

简单的方法：

SELECT 
  artists.id, 
  (select actors.id 
   from actors 
   where artists.title = actors.title 
   order by actors.count desc Limit 1) 
  as actors_id,
  (select actors.count 
   from actors 
   where artists.title = actors.title 
   order by actors.count desc Limit 1) 
  as actors.count 
FROM 
  artists 
;

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此处缺少某些按条件分组。此处缺少某些按条件分组。