如何从PHP和MySQL中的统计信息获取玩家排名

Question

我有以下代码，我正在尝试从mysql获取播放速度等级。

Mysql表称为帐户

 Username | Speed
 -----------------
 Player1     21
 Player2     52
 Player3     33   

 Player2 52(Ranked:1)
 Player3 33(Ranked:2)
 Player2 21(Ranked:3)

 $result = mysql_query("SELECT * FROM accounts") or die (mysql_error());
 while($row = mysql_fetch_array($result)) {
          $username= $row[username];
 $speed = $row['speed'];
  }

对不起，我一直在尝试不同的方法，但我无法使它正常工作

Answer 1

为什么不简单地：

$result = mysql_query("SELECT * FROM accounts ORDER BY speed DESC") or die (mysql_error());

$rank = 1;
while($row = mysql_fetch_array($result)) {
    $username= $row[username];
    $speed = $row['speed'];
    $rank++;
}

Answer 2

只需按速度对其进行排序：

$result = mysql_query("SELECT * FROM accounts ORDER BY speed DESC") or die (mysql_error());
$prev_rank = 0;
 while($row = mysql_fetch_array($result)) {
          $username= $row['username'];
          $speed = $row['speed'];
          $rank = ++$prev_rank;
  }

了解有关ORDER BY 。

Answer 3

用它：

$result = mysql_query("SELECT * FROM accounts ORDER BY speed DESC") or die (mysql_error());