Question

我的表中有多个列..

     col1   col2  col3     price
     500    700    100       10
     501    700    100       20
     502    700    100       30
     503    700    100       10
      4                      70

我需要计算col1并显示其总和。

并显示价格栏的总和......

但主要的是我需要在最后一行显示这个......在所有数据之后...如何选择这个并在最后一行回显......

请帮助我...

我需要完全回应，因为我将数据放在上表中......

我需要sql查询，还需要帮助才能仅回显最后一行中这两列的总和......

SELECT *,IFNULL(col1,'SUM'), count(*) as count FROM coupon_entry  WHERE Group By col1 WITH ROLLUP


<?php  if (is_array($data)) { foreach($data as $row){ ?>
        <tr>            

            <td><?php echo htmlspecialchars($row['col1']); ?></td>
            <td><?php echo htmlspecialchars($row['col2']); ?></td>          
            <td><?php echo htmlspecialchars($row['col3']); ?></td>
            <td><?php echo htmlspecialchars($row['price']); ?></td>
        </tr>
        <?php } }?>

Answer 1

一种解决方案是使用变量计算PHP中的总和：

<?php  if (is_array($data)) {
$totalCol1 = 0; 
$totalPrice = 0;
foreach($data as $row){ 
$totalCol1 += $row['col1'];
$totalPrice += $row['price'];
?>
        <tr>            

            <td><?php echo htmlspecialchars($row['col1']); ?></td>
            <td><?php echo htmlspecialchars($row['col2']); ?></td>          
            <td><?php echo htmlspecialchars($row['col3']); ?></td>
            <td><?php echo htmlspecialchars($row['price']); ?></td>
        </tr>
        <?php } 
        <tr>
            <td><?php echo $totalCol1;?></td>
            <td></td>          
            <td></td>
            <td><?php echo $totalPrice;?></td>
        </tr>
}?>

Answer 2

要么你必须做两个单独的查询，否则你必须在PHP中进行计算 - 任何一个都相当简单，尽管PHP解决方案可能会稍微（可忽略不计？）更快。

双查询：

$r = query('SELECT *
            FROM yada-yada');
while ($row = fetch($r)) {
    echo "<td>$row[col1]</td>\n";
    echo "<td>$row[col2]</td>\n";
    echo "<td>$row[col3]</td>\n";
    echo "<td>$row[price]</td>\n";
}

$r2 = query('SELECT COUNT(*) as cnt, sum(col1) as sum_col1, 
               sum(price) as sum_price
            FROM yada-yada...');
if ($row = fetch($r2)) {
    echo "<td>$row['cnt']</td><td>$row['sum_col1']</td>...$row['sum_price']...\n";
}

用PHP计算：

$cnt = $sum_col1 = $sum_price = 0;
$r = query('SELECT *
            FROM yada-yada');
while ($row = fetch($r)) {
    echo "<td>$row[col1]</td>\n";
    echo "<td>$row[col2]</td>\n";
    echo "<td>$row[col3]</td>\n";
    echo "<td>$row[price]</td>\n";
    $cnt++;
    $sum_col1 += $row['col1'];
    $sum_price += $row['price'];
}
echo "<td>$cnt</td><td>$sum_col1</td>...$sum_price...\n";

Answer 3

下面是我的sql查询来获取计数和列的总和。

SELECT COUNT（优惠券）总计，SUM（价格）AS TotalPrice FROM coupon_entry

把它放在桌子下方的单独行中......

<?php   
foreach($tot as $tota) 
?>
        <tr style="background-color:#33CCFF;">
            <td colspan="2" style="text-align:right; font-weight:bold;">Total Coupon</td>

            <td><?php echo $tota['Total'];?></td>
            <td style="text-align:right; font-weight:bold;">Total Amount in Rs</td> 
            <td><?php echo $tota['TotalPrice'];?></td>
        </tr>           
            <?php }?>

用于选择列的总和和计数的php代码

3 个答案: