Question

假设您有一个这样的表：

id user score

这是用户分数的转储，其中每个user可以有N score个。

如何为每位用户选择最高分？

Answer 1

SELECT user,max(score) 
FROM mytable 
GROUP BY user

Answer 2

select user, max(score) as HighScore
from table
group by user
order by max(score);

那应该能满足你的需求。

修改添加了语句终止符

Answer 3

SELECT user, MAX(score) FROM [TABLE] GROUP BY user

Answer 4

MAX（得分）的替代方法是使用PHP迭代得分列表并选择最高。

while ( $curUser = mysql_fetch_assoc($userQry) ) {
    $highest = 0;
    $scores = explode(',',$curUser["score"]);
    foreach($scores as $score){
        if ($highest < $score)
        $highest = $score;
    }
}

MySQL - 从每个不同的列类型中选择最高计数

4 个答案: