Php 向表列添加标题，并从SQL输出总计

我有这个密码

$sqlstr = mysql_query(
    "SELECT * FROM sales where passport = '{$therecord['passport']}'");
if (mysql_numrows($sqlstr) != 0) {
    echo "<b>Sales for {$therecord['firstname']} {$therecord['lastname']}</b>";
    while ($row = mysql_fetch_array($sqlstr)) {
        echo "<table><tr>";
        echo "<td>{$row['product']}</td>";
        echo "<td>{$row['quantity']}</td>";
        echo "<td>{$row['cost']}</td>";
        echo "</tr>";
        echo "</table>";
    }
}

$sqltotal = mysql_query(
    "SELECT SUM(cost) FROM sales where passport = '{$therecord['passport']}'");
echo "<b>Total Owing: {$sqltotal}</b>";

我想给每个表列添加一个标题，也许它们之间有一些间距

我该怎么做呢

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此外，我试图使用SQL SUM函数并输出一个总数，但目前它输出的是类似id24的内容…

在启动while循环之前只需回显它即可：

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至于求和问题，这是因为您正在回显资源ID。您还需要在该资源上调用mysql_fetch_数组或类似函数，就像在另一个资源上一样。

您可以在while循环之前回显表标题

<thead>
    <tr>
        <th>Name:</th>
        <th>Quantity:</th>
        <th>Cost:</th>
    </tr>
</thead>
<?php
$sqlstr = mysql_query("SELECT * FROM sales where passport = '{$therecord['passport']}'");
if (mysql_numrows($sqlstr) != 0) {
    ....
}
....
?>

这将使用mysql\u结果对求和问题进行排序。目前您只输出资源

$sqltotal = mysql_result(mysql_query("SELECT SUM(cost) FROM sales where passport = '{$therecord['passport']}'"),0);
echo "<b>Total Owing: {$sqltotal}</b>";

只需运行数字或行，因为查询与上面相同

试试这个求和：

$sqltotal = mysql_query("SELECT SUM(cost) AS totalcost FROM sales WHERE passport = '" . mysql_real_esacpe_string($therecord['passport] . "';
$row = mysql_fetch_array($sqltotal);
echo "<b>Total Owing: {$row['totalcost']}</b>";

关于金额： 运行查询后，您需要获得结果

$sqltotal = mysql_query("SELECT SUM(cost) as total FROM sales where passport = '{$therecord['passport']}'");
$row = mysql_fetch_array($sqltotal);
            echo "<b>Total Owing: {$row['total']}</b>";

---

对于总计，不运行第二个查询，只需将成本转储到一个临时变量，并在通过查询数组循环时递增

$sqlstr = mysql_query(
    "SELECT * FROM sales where passport = '{$therecord['passport']}'");
if (mysql_numrows($sqlstr) != 0) {
    echo "<b>Sales for {$therecord['firstname']} {$therecord['lastname']}</b>";
    while ($row = mysql_fetch_array($sqlstr)) {
        echo "<table><tr>";
        echo "<td>{$row['product']}</td>";
        echo "<td>{$row['quantity']}</td>";
        echo "<td>{$row['cost']}</td>";
        echo "</tr>";
        echo "</table>";
        $_t += $row['cost'];
    }
}
echo "<b>Total Owing: {$_t}</b>";

缺点： 只有在循环完成后才能获得总值

---

标题。。只需在循环之前打印即可。

我发布了我的回复，但我误读了问题：/这个答案更适用！mysql扩展处于过时状态。改为使用mysqli扩展。@artifact:…最好使用too。默认情况下，mysql\u fetch\u数组允许数字和关联访问。返回类型默认为MYSQL\u两者。MYSQL\u num\u rows不是答案，这将只返回行数，而不是成本的总和。

$sqltotal = mysql_query("SELECT SUM(cost) as total FROM sales where passport = '{$therecord['passport']}'");
$row = mysql_fetch_array($sqltotal);
            echo "<b>Total Owing: {$row['total']}</b>";

$sqlstr = mysql_query( 
    "SELECT * FROM sales where passport = '{$therecord['passport']}'"); 
if (mysql_numrows($sqlstr) != 0) { 
    echo "<b>Sales for {$therecord['firstname']} {$therecord['lastname']}</b>"; 
    echo "<table>";
    echo "<tr>"; 
    echo "<th>Product</th>"; 
    echo "<th>Quantity</th>"; 
    echo "<th>Cost</th>"; 
    echo "</tr>"; 
    while ($row = mysql_fetch_array($sqlstr)) { 
        echo "<tr>"; 
        echo "<td>{$row['product']}</td>"; 
        echo "<td>{$row['quantity']}</td>"; 
        echo "<td>{$row['cost']}</td>"; 
        echo "</tr>"; 
    } 

    $sqltotal = mysql_query( 
        "SELECT SUM(cost) AS Total FROM sales where passport = '{$therecord['passport']}'"); 
    $totalRow = mysql_fetch_array($sqltotal)) { 
    echo "<tr>"; 
    echo "<td colspan=\"2\"></td>"; 
    echo "<td><b>Total Owing: {$totalRow['Total']}</b></td>"; 
    echo "</tr>"; 

    echo "</table>"; 
} 

$sqlstr = mysql_query(
    "SELECT * FROM sales where passport = '{$therecord['passport']}'");
if (mysql_numrows($sqlstr) != 0) {
    echo "<b>Sales for {$therecord['firstname']} {$therecord['lastname']}</b>";
    while ($row = mysql_fetch_array($sqlstr)) {
        echo "<table><tr>";
        echo "<td>{$row['product']}</td>";
        echo "<td>{$row['quantity']}</td>";
        echo "<td>{$row['cost']}</td>";
        echo "</tr>";
        echo "</table>";
        $_t += $row['cost'];
    }
}
echo "<b>Total Owing: {$_t}</b>";