MySQL - 在执行查询时插入额外的空白行答案

【问题标题】：MySQL - Inserting extra blank row on executing queryMySQL - 在执行查询时插入额外的空白行
【发布时间】：2013-02-21 05:09:55
【问题描述】：

这是我的程序代码：

<?php



error_reporting(E_ALL);
ini_set('display_errors', true);

$host           = "localhost";
$user_name      = "usr";
$pwd            = "pwd";
$database_name  = "my2"; //assuming you created this

mysql_connect($host, $user_name, $pwd)or die(mysql_error());
mysql_select_db($database_name)or die(mysql_error());

$datee              = $_POST['datee'];
$time               = $_POST['time'];
$destination        = $_POST['destination'];
$days               = $_POST['days'];
$cab                = $_POST['cab'];
$route              = $_POST['route'];
$full_name          = $_POST['full_name'];
$address            = $_POST['address'];
$mobile_number      = $_POST['mobile_number'];
$pickup_location    = $_POST['pickup_location'];

$query2 = "SELECT `order_number` FROM `count` WHERE 1";
$countQuery = mysql_query($query2)or die(mysql_error());

while($row = mysql_fetch_array($countQuery))
{
    $order_number = $row["order_number"];
}

$query3 = "UPDATE `count` SET `order_number` = '".$order_number."'+ 1 WHERE 1";
mysql_query($query3)or die(mysql_error());

$query1="INSERT INTO booking VALUES     ('".$datee."','".$time."','".$destination."','".$days."','".$cab."','".$full_name."','".$ad       dress."','".$mobile_number."','".$pickup_location."','".$route."','".$order_number."')";
mysql_query($query1)or die(mysql_error());
?>

<html>
<body>
<div style="border:1px solid black;background-color:#FAFA23;width:600px;height:100px;">
<table>
<tr>
<td>
<?php
echo "Your order number is :".$order_number;
?>
</td>
</tr>

<tr align="center">
<td>Thank you for booking, We will contact you soon ! </td>
</tr>
</table>
</body>
</html>

在执行这个程序时，每次都会添加一个额外的行。请告诉我这段代码有什么问题？此外，当我想将列的值增加 1 时，它会增加 2..see-order_number=order_number+1;

【问题讨论】：

order_number + 1 是什么。？？ order_number 不是变量，在更新查询中使用 $order_number + 1..
order_number 是表“count”中的列名
我知道它是表字段，但在更新查询中，您使用 SET order_number=order_number+1 必须为 SET order_number=$order_number+1 ...您需要定义 $order_number 变量.
好的，那多余的空白行呢。
order_number=$order_number+1 增加值 1，但不会增加字段中的值。

标签： php mysql row

【解决方案1】：

<?php
    error_reporting(E_ALL);
    ini_set('display_errors', true);

    $host           = "localhost";
    $user_name      = "usr";
    $pwd            = "pwd";
    $database_name  = "db"; //assuming you created this

    mysql_connect($host, $user_name, $pwd)or die(mysql_error());
    mysql_select_db($database_name)or die(mysql_error());

    $datee              = $_POST['datee'];
    $time               = $_POST['time'];
    $destination        = $_POST['destination'];
    $days               = $_POST['days'];
    $cab                = $_POST['cab'];
    $route              = $_POST['route'];
    $full_name          = $_POST['full_name'];
    $address            = $_POST['address'];
    $mobile_number      = $_POST['mobile_number'];
    $pickup_location    = $_POST['pickup_location'];

    $query2 = "SELECT order_number FROM `count` WHERE 1";
    $countQuery = mysql_query($query2)or die(mysql_error());

    while($row = mysql_fetch_array($countQuery))
    {
        $variable = $row["order_number"];
    }

    $query3 = "UPDATE `count` SET `order_number` = ''".$order_number."'+ 1 WHERE 1";
    mysql_query($query3)or die(mysql_error());

    $query1="INSERT INTO booking VALUES ('".$datee."','".$time."','".$destination."','".$days."','".$cab."','".$full_name."','".$address."','".$mobile_number."','".$pickup_location."','".$route."','".$variable."')";
    mysql_query($query1)or die(mysql_error());
?>

我已在此处更新了您的问题代码，尝试一下，他们发现它有效。

不要忘记创建$order_number 变量。

【讨论】：

它不起作用..我认为这是因为此代码在表 'booking' 中添加了一个额外的行，其值仅为 'order_number' 列，并且比前一行多一个。
与之前相同的问题，它将 order_number 增加了 2 并添加了额外的行
@user2085757 它在哪个表中添加了额外的行..??并且 order_number 添加了两个，因为您可能已经在更新查询中一次又一次地增加了它，您又增加了一个...请使用所有代码更新问题...请
我已经用整个代码编辑了我的问题..现在请编辑它以使其运行良好..