Question

我面临的问题是，我想加入这两个问题。

   SELECT recipes.RecipeID ,recipes.Name,recipes.ImageThumb,recipes.RatingTotal,
   count(ratings.RecipeID) AS trates  
   FROM recipes 
        JOIN ratings 
            ON ratings.RecipeID = recipes.RecipeID 
   WHERE recipes.Name LIKE '%ade%'  
   ORDER BY Name;

此查询无法正常工作，当有多个结果时，它会带来1个结果，并且trates将作为所有结果的总和，而不仅仅是针对特定的RecipeID

Answer 1

我认为这就是你要找的东西：

SELECT recipes.RecipeID ,recipes.Name,recipes.ImageThumb,recipes.RatingTotal,
       COUNT(ratings.RecipeID) AS trates  
FROM recipes 
     LEFT JOIN ratings 
         ON ratings.RecipeID = recipes.RecipeID 
WHERE recipes.Name LIKE '%ade%'  
GROUP BY RecipeID 
ORDER BY Name;

Mysql，加入查询，困惑

1 个答案: