仅从MySQL数据库中选择最高分

Question

我有一个MySQL声明可以从用户表中取回前15个分数。

select @rownum:=@rownum+1 'rank', driverName, teamColour, totalScore, totalTime, didTyreChange from entries p, (SELECT @rownum:=0) r WHERE totalTime > 1000 and progress = 19 order by totalScore desc, totalTime asc limit 15 

条件是，玩家必须完成所有问题（其中进度= 19）并且最终时间必须超过1秒（总时间> 1000）。该陈述还将其等级作为变量返回（@rownum：= @ rownum + 1＆＃39; rank＆＃39;）。

此查询的结果如下

我现在想做的是，将结果扩展到仅显示玩家的最高分。我查看了DISTINCT和GROUP BY但是使用以下GROUP BY语句获得了这些结果

select @rownum:=@rownum+1 'rank', driverName, teamColour, totalScore, totalTime, didTyreChange from entries p, (SELECT @rownum:=0) r WHERE totalTime > 1000 and progress = 19 group by driverName order by totalScore desc, totalTime asc limit 15

并且DISTINCT没有，因为我收到错误代码1064.我已经尝试了两个

select @rownum:=@rownum+1 'rank', DISTINCT(driverName), teamColour, totalScore, totalTime, didTyreChange from entries p, (SELECT @rownum:=0) r WHERE totalTime > 1000 and progress = 19 order by totalScore desc, totalTime asc limit 15 

和

select DISTINCT driverName, @rownum:=@rownum+1 'rank', teamColour, totalScore, totalTime, didTyreChange from entries p, (SELECT @rownum:=0) r WHERE totalTime > 1000 and progress = 19 order by totalScore desc, totalTime asc limit 15

两者均未提供所需结果。我想知道是否有一种简单的方法可以在语句中实现这一点，或者在PHP方面做到这一点。

期望的结果L

viper         1  9810
Maverick      2 25420
Racer roasty  3 28850
.. .
...          15

换句话说，没有用户应该在结果中出现两次，只为每个用户显示最快的totalTime。

在这里修剪SQLFiddle http://sqlfiddle.com/#!2/36d3dc/7（达到8000个字符限制）。

Answer 1

SELECT @i:=@i+1 rank, a.*
  FROM 
     ( SELECT x.*
         FROM entries x
         JOIN (SELECT drivername, MIN(totaltime) min_totaltime FROM entries WHERE progress = 19 AND totaltime > 1000 GROUP BY drivername) y
           ON y.drivername = x.drivername
          AND y.min_totaltime = x.totaltime
     ) a
     , (SELECT @i:=0) i
 ORDER 
    BY totalScore desc, totalTime asc;

http://sqlfiddle.com/#!2/36d3dc/17

Answer 2

如果我理解您的问题，那么以下查询将对您有所帮助：

select *,@rownum:=@rownum+1 as 'rank' from (select * from (select  driverName, teamColour, totalScore, totalTime, didTyreChange from entries p WHERE totalTime > 1000 and progress = 19 order by totalScore desc, totalTime asc  )a group by driverName)c , (select @rownum:=0)f

Answer 3

这应该做：

select @rownum:=@rownum+1 'rank', driverName, totalScore, MIN(totalTime) 
from entries p, (SELECT @rownum:=0) r 
WHERE totalTime > 1000 and progress = 19 
group by driverName 
order by totalScore desc, totalTime asc 

http://sqlfiddle.com/#!2/36d3dc/20/0