Question

假设您具有以下架构（id，user_id，score）。如何为每个用户提供具有最高分数的行，然后为所有行排序以获得分数。换句话说，我想要一个每个用户都有最佳结果的排名。

Answer 1

select user_id, max(score)
from user_scores
group by user_id
order by max(score)

Answer 2

应该是这样的：

 SELECT UNIQUE user_id, score FROM TABLE 
    ORDER BY SCORE DESC

Answer 3

select @rownum := @rownum + 1 AS rank, user_id, MAX(score) as Score
      from table_name t,
      (SELECT @rownum := 0) r
      GROUP BY user_id
      ORDER BY Score

聚合使行保持最大值

3 个答案: