只显示一个客户

Question

我想计算一个客户订购产品的总和我该怎么做？

我有以下代码

$result = mysql_query ("SELECT order_item_name, SUM(product_quantity) FROM wntl_virtuemart_order_items WHERE wntl_virtuemart_order_items.order_item_sku BETWEEN 2 and 2.9 AND order_status= 'U'  GROUP BY order_item_sku");   

while($row=mysql_fetch_array($result))   {   
echo "<tr>";   
echo "<td align='center' width='200'>" . $row['order_item_name'] . "</td>";    
echo "<td align='center' width='200'>" . $row['SUM(product_quantity)'] . "</td>";   
echo "</tr>";   
}

使用这段代码我得到了总计我想查看一位顾客的总数

thx 提前 grtz

Answer 1

如果您想按客户计数，则需要在 WHERE 条件中指定客户 ID。

例如如果客户 ID 出现在 wntl_virtuemart_order_items table 中，那么您的查询将如下所示：

SELECT order_item_name, SUM(product_quantity) 
FROM wntl_virtuemart_order_items 
WHERE wntl_virtuemart_order_items.order_item_sku BETWEEN 2 and 2.9 AND order_status= 'U' AND customer_id = ?
GROUP BY order_item_sku

如果客户 ID 存在于另一个 table 中，那么您将需要使用 JOIN 两个 table，如下例所示：

SELECT order_item_name, SUM(product_quantity) 
FROM wntl_virtuemart_order_items JOIN wntl_virtuemart_orders ON wntl_virtuemart_order_items.virtuemart_order_id  = wntl_virtuemart_orders.virtuemart_order_id 
WHERE wntl_virtuemart_order_items.order_item_sku BETWEEN 2 and 2.9 AND wntl_virtuemart_order_items.order_status= 'U' AND wntl_virtuemart_orders.customer_number = ?
GROUP BY order_item_sku

只显示一个客户

show one custommer only

php

mysql

database

ms-query