如何在具有相同ID的数据库表中显示组合的行

Question

i have a question for the experts. I have no idea how to combine all the order ID with the same ID,

like in the picture, all orders with order ID = 1 are in one transaction, how do i combine all order IDs with the same id and display only one total price for all of the proudcts bought. and since all order ID are the same so the deliver and payment option will also be the same just need to display one row.

and a follow up question is how will i also show all the products bought if i combine all the same order IDs, compute the total price and display delivery and payment option in one single row

Here is the picture for my database relationship, i just followed the ones on the internet. the only difference is that "products" are changed to "inventory" and "serial" in products are changed to "prod_id"

here are my codes to display the current picture.

<?php
    session_start();
    $conn = @mysql_connect("localhost","root","");
    $db = @mysql_select_db("");

$qry = "SELECT customers.name,customers.payment,customers.carrier, orders.date, order_detail.productid, order_detail.quantity, order_detail.price, order_detail.orderid, inventory.prod_name 
        FROM customers 
        RIGHT JOIN orders on customers.serial=orders.serial 
        RIGHT JOIN order_detail on orders.serial=order_detail.orderid 
        LEFT JOIN inventory on order_detail.productid=inventory.prod_id where customers.email='{$_SESSION['email']}'";

mysql_set_charset("UTF8");
$result = @mysql_query($qry);
if($result === FALSE) {
    die(mysql_error()); // TODO: better error handling
}
echo "<center>";
echo "<table class='CSSTableGenerator'>
<tr>

<td>Date of Purchase</td>
<td>First Name</td>
<td>Order ID</td>
<td>Products</td>
<td>Quantity</td>
<td>Total Price</td>
<td>Delivery Option</td>
<td>Payment Option</td>

<tr>";
while ($row=mysql_fetch_array($result)){
echo "<tr>";
echo "<td>".$row['date']."</td>";
echo "<td>".$row['name']."</td>";
echo "<td>".$row['orderid']."</td>";
echo "<td>".$row['prod_name']."</td>";
echo "<td>".$row['quantity']."</td>";
echo "<td>".($row['price']*$row['quantity'])."</td>";
echo "<td>".$row['carrier']."</td>";
echo "<td>".$row['payment']."</td>";
echo "</tr>";
    }
echo "</table>";
?>
</table>

Answer 1

It seems that what you're needing to learn for this particular question is the SQL Group By clause.

This (untested, might need minor tweaking) should do the trick. Note that you don't get order item quantities out of this, but I would say that it's possible to get them.

SELECT o.date, c.name, o.serial as 'Order Id', GROUP_CONCAT(p.name) as 'Products', SUM(od.price) as 'Total', c.carrier, c.payment
FROM orders o
JOIN customers c on o.customer_id = c.serial
JOIN orderdetail od on o.serial = od.orderid
JOIN products p on od.productid = products.prod_id
GROUP BY o.serial

Of particular note is a handy aggregate function in MySQL called GROUP_CONCAT. http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html#function_group-concat