Question

我有下表：

  userid  compid round score    bonus
  2980    3     0     50          0
  50        3     0     80          0
  52        3     0     80          0
  55        3     0     20          0
  58        3     0     100         0
  106      3     0     120         0
  555      3     0     50          0
  100     3     0     30          0
  50        3     1     90          0
  52        3     1     50          0
  106      3     1     30          0

我希望不仅可以对所有轮次的每个用户的得分和奖励总数求和，而且还可以相应地对它们进行排名。它应该能够处理序列1,2,2,4,5,5,5,8：

Trick是我不想创建临时表或将排名插入表中。此外，我无法限制回报 - 因此无论轮次完成，都需要对整个表进行排名。

我已设法对行进行排名，但似乎无法用总和对它们进行分组。当然，我已经单独管理了这笔钱 - 我只需要'加入'这两个步骤。

获得每位用户的总和：

SELECT userid,sum(score+bonus) as tscore from entries 
group by userid order by tscore desc

userid  tscore
50      170
106    150
52      130
58      100
2980      50
555    50
100    30
55        20

没有得分总和的排名:(感谢MySQL Cookbook）

SELECT @rownum := @rownum + 1 AS row,
@rank := IF(@prev_val!=score,@rownum,@rank) AS rank,
userid,
@prev_val := score AS score
FROM exodus_entries ORDER BY score DESC

row   rank  userid      score
1      1    106         120
2      2    58          100
3      3    50          90
4      4    50          80
5      4    52          80
6      6    52          50
7      6    555         50
8      6    2980        50
9      9    100         30
10    9     106         30
11    11    55          20

感谢您的时间和帮助！欢迎所有建议！

Answer 1

SELECT @rownum := @rownum + 1 AS row,
    @rank := IF(@prev_val!=score,@rownum,@rank) AS rank,
    userid,
    @prev_val := score AS score
FROM (
    SELECT userid, sum(score+bonus) as score 
    from entries 
    group by userid 
) exodus_entries 
ORDER BY score DESC

Answer 2

我有同样的问题，我执行了 SET @rownum = 0, @rank = 1, @prev_val = NULL;

在运行以下代码之前：

SELECT @rownum := @rownum + 1 AS row,
@rank := IF(@prev_val!=total_number,@rownum,@rank) AS rank,
your_column,
@prev_val := total_number AS total_number
FROM your_table ORDER BY total_number DESC;

Answer 3

我认为这应该可以解决问题：

SELECT userid,round, sum(score+bonus) as tscore from entries 
group by userid, round order by tscore desc

虽未经过测试。

mySQL总结多行和排名处理关系

3 个答案: