Question

我正在制作我的产品页面，其中我有许多产品具有相同的名称，但规格和价格不同。

PHP代码：

<code>
        $SelectList = "SELECT a.p_id, a.dis,a.name,b.p_id,b.rate 
            FROM tst1 a 
            INNER JOIN max b 
            ON a.p_id = b.p_id GROUP BY name";
    $Query = mysql_query($SelectList) or die(mysql_error());
    $Num_rows = mysql_num_rows($Query);
    $array = array();

    while($Data=mysql_fetch_assoc($Query))
        {
            $array['name'][] = $Data['name'];
            $array['rate'][] = $Data['rate'];
            $array['dis'][] = $Data['dis'];
        }

</code>

<code>
<table border="1">
    <thead>
            <th>Description</th>
            <th>Unit</th>
            <th>Qty</th>
            <th>Rate</th>
    </thead>
            <tr>
            <td colspan="0">BUTTERFLY VALVES</td>
    </tr>
    <tr>
            <td>65 mm</td>
            <td>Nos</td>
            <td>15</td>
            <td>40%</td>
    </tr>
            <tr>
            <td colspan="0">BUTTERFLY VALVES</td>
    </tr>
    <tr>
            <td>85 mm</td>
            <td>Nos</td>
            <td>45</td>
            <td>40%</td>
    </tr>
           <tr>
            <td colspan="0">WASHER VALVES</td>
    </tr>
    <tr>
            <td>32 mm</td>
            <td>Nos</td>
            <td>95</td>
            <td>30%</td>
    </tr>
    </table>
</code>

所以我想要的是，如果产品名称相同，那么只需获取＆＃34; name＆＃34;曾经，它的单位，数量和数量率＆＃34;所有这些。

<code>
<table style="position:relative; top:10px; bottom:10px; left:200px" border="1">
    <thead>
            <th>Description</th>
            <th>Unit</th>
            <th>Qty</th>
            <th>Rate</th>
    </thead>
            <tr>
            <td colspan="0">BUTTERFLY VALVES</td>
    </tr>
    <tr>
            <td>65 mm</td>
            <td>Nos</td>
            <td>15</td>
            <td>40%</td>

            <td>85 mm</td>
            <td>Nos</td>
            <td>45</td>
            <td>40%</td>
    </tr>
           <tr>
            <td colspan="0">WASHER VALVES</td>
    </tr>
    <tr>
            <td>32 mm</td>
            <td>Nos</td>
            <td>95</td>
            <td>30%</td>
    </tr>
    </table>
</code>

Answer 1

检查这个subquery ..这会帮助你..

$qry = mysqli_query("select * from product group by name");
while($row = mysqli_fetch_array($qry))
{
    echo "<tr><td colspan="0">'".$row['name']."'</td></tr>";
    $qry2 = mysqli_query("select * from product where name = '".$row['name']."'");
    echo "<tr>";
    while($row2 = mysqli_fetch_array($qry2))
    {
         echo "<td>'".$row2['mm']."'</td><td>'".$row2['nos']."'</td><td>'".$row2['qty']."'</td><td>'".$row2['percentage']."'</td>";
    }
    echo "</tr>";
}

Answer 2

您可以在SQL中使用distinct或group by运算符来执行此操作。

distinct的用法如下所示：

SELECT DISTINCT column_name,column_name
FROM table_name;

您可以查看distinct的{{3}}示例。

group by的用法如下所示：

SELECT column_name, aggregate_function(column_name)
FROM table_name
WHERE column_name operator value
GROUP BY column_name;

以下是group by的{{3}}。

我希望这会有所帮助。

获取同名项的值，而不重复项名称？

2 个答案: