真的很大的SELECT查询

Question

我想询问是否有更快的方法来进行此查询？实际上完成需要大约100秒.我在表中有大约10 000 000(1 GB)行.这是统计信息生成脚本.

这是查询:

  $results=mysql_query("SELECT * FROM hawkeye WHERE player_id='".$playerID."'") or die("MYSQL ERROR: ".mysql_error());

然后是php代码:

  $row = mysql_fetch_array($results)
  if($row["action"] == 4){$commandcount++;}
  else if($row["action"] == 3){$chatcount++;}
  else if($row["action"] == 1){$placedcount++;}
  else if($row["action"] == 0){$breakcount++;}
  else if($row["action"] == 5){$joincount++;}
  else if($row["action"] == 6){$quitcount++;}
  else if($row["action"] == 7){$qteleportcount++;}
  else if($row["action"] == 12){$pvpdeathcount++;}
  else if($row["action"] == 21){$mobkillcount++;}
  else if($row["action"] == 22){$otherdeathcount++;}
  else {}

谢谢你的回答!

Answer 1

使用MYSQL为您做数学运算.它比PHP更快:

SELECT COUNT(*) AS action_count
     , action
FROM hawkeye 
WHERE player_id='".$playerID."'"
GROUP BY action

while ($row = mysql_fetch_assoc($result))
{
    echo $row['action'] . ': ' . $row['action_count'] . "<br>" . PHP_EOL;
}