我已经统计了投票给某个候选人的选民人数,我想显示哪一个获得了最高的投票数。我试图将它们存储在变量中,以便我可以使用 max() 方法,但我收到错误“未定义”。请提供任何帮助
<?php
$query="select count(*) as total from voting Where ca_id=1";
//ca_id is the candidate id that voter choose
$result = mysql_query($query);
$row = mysql_fetch_assoc($result);
echo"$row[total]<br>";
$query="select count(*) as total2 from voting Where ca_id=2";
$result = mysql_query($query);
$row2 = mysql_fetch_assoc($result);
echo"$row2[total2]<br>";
$query="select count(*) as total3 from voting Where ca_id=3";
$result = mysql_query($query);
$row3 = mysql_fetch_assoc($result);
echo"$row3[total3]<br>";
$query="select count(*) as total4 from voting Where ca_id=5";
$result = mysql_query($query);
$row4 = mysql_fetch_assoc($result);
echo"$row4[total4]<br>";
?>
最佳答案
您不需要为此执行四个查询。您可以只使用一个查询。在你的情况下,你可以这样做:
select ca_id, count(*) as counter from voting group by ca_id order by counter desc
你可以通过一个查询得到你的结果
如前所述,在这种情况下,对于与数据库相关的调用,PDO 是更好的选择
关于PHP从mysql表中获取最大数,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16672098/