显示数据库值的总和-PHP

嗨，我需要得到数据库字段sbstart的总和。我将代码改为SUM（sbstart），但这似乎不是一个有效的移动。如何显示总和？谢谢

        <?php


$host = 'localhost';
$user = 'root';
$pass = '';
$db = 'regional_data';
@ $db = mysqli_connect($host, $user, $pass, $db);

if(mysqli_connect_errno())
{
    die('The connection to the database could not be established.');
}
$query = "SELECT SUM(sbstart) FROM newchk WHERE dist_chk ='$distUsr'";
$result = mysqli_query($db, $query);

while ($recS = mysqli_fetch_array($result)){

echo ($recS['sbstart']);    
}
?>

---

您需要使用
mysqli\u fetch\u assoc
而不是
mysql\u fetch\u array
，或者您需要执行
echo$recS[0]
更改

$query = "SELECT SUM(sbstart) FROM newchk WHERE dist_chk ='$distUsr'";

$query = "SELECT SUM(sbstart) FROM newchk WHERE dist_chk ='$distUsr'";

（使用别名）

然后

改变

到

改变

echo ($recS['sbstart']);

到

SUM（）与while（循环）无关。它从数据库中返回任意数量的匹配的单个结果：），因此放弃while循环。用if替换while，反正它只发生过一次。@Claudrian是的，我想它也快得多。谢谢你的精彩表演！
$query = "SELECT SUM(sbstart) FROM newchk WHERE dist_chk ='$distUsr'";

$query = "SELECT SUM(sbstart) AS sum FROM newchk WHERE dist_chk ='$distUsr'";

echo ($recS['sbstart']);

echo ($recS['sum']);