Question

I am what you would call a ‘noob’ at MySQL. I can insert/edit/select stuff, but anything more advanced than that stumps me. I have two tables in my database:

Table ‘reviews’

id      int(11)
review  varchar(2500)
game    int(11)
user    int(11)
title   varchar(200)`

and Table ‘review_rating’

user    int(11)
review  int(11)     // Corresponds to `reviews.id`
like    tinyint(1)

Here is my question: Is it possible to use ORDER BY on the reviews table to order the result by the total number of review_ratings with ‘like’ = 1 (where ‘review’ = the id of the ‘reviews’ table) divided by the total number of review_ratings (where ‘review’ = the id of the ‘reviews’ table).

Example:

SELECT * 
FROM `reviews` 
WHERE `game` = ? 
ORDER BY (total number of review_ratings where review = reviews.id and like = 1 / 
         total number of review_ratings where review = reviews.id) 
LIMIT 0, 10

Answer 1

SELECT  t.review,
        Score = CASE WHEN TotalReviews<> 0 THEN LikedReviews/TotalReviews ELSE NULL END
  FROM  (
              SELECT    *,
                    (SELECT COUNT(*) FROM review_rating WHERE review = r.review) AS TotalReviews ,
                    (SELECT COUNT(*) FROM review_rating WHERE review = r.review AND like = 1) AS LikedReviews,
              FROM  review r        
             WHERE  game = ?
         )t
ORDER BY t.review, Score