Question

我的MySQL数据库中有两个表：

客户
customer_billing

customer 表的列为

列

序列
公司

* customer_billing *表包含列

序列
customer_seq

我正在* customer_billing *表上运行select查询，然后在while循环中在 customer 表中选择查询，如下所示：

$sql="SELECT *, SUM(quantity*unitprice) as customertotal from customer_billing where resellerid = '' and salesmanid = '' and producttype = '".$_GET["producttype"]."' group by customer_seq ";
    $rs=mysql_query($sql,$conn) or die(mysql_error());
    while($result=mysql_fetch_array($rs))
    {
        $sql2="SELECT * from customer where sequence = '".$result["customer_seq"]."' and company_status = '' ";
        $rs2=mysql_query($sql2,$conn) or die(mysql_error());
        $result2=mysql_fetch_array($rs2);
}

我希望能够从客户表中订购company ASC显示的结果

我已经尝试过order_by customer_seq，显然这只是命令序列号

我也尝试在客户表格查询上按company ASC进行排序，但这不起作用

我怎么能绕过这个？

Answer 1

您应该在customer_seq上建立客户和customer_billing之间的联接，并将公司添加到group by子句中。

这样你就可以按公司订购。

Answer 2

您可以使用Joins而无需使用second query试试这个，

$sql="SELECT c.*,ct.*, SUM(ct.quantity*ct.unitprice) as customertotal FROM
    customer_billing ct , custom c WHERE ct.resellerid = '' AND ct.salesmanid = '' 
    AND c.company_status = '' AND c.sequence=ct.customer_seq AND 
    ct.producttype = '".$_GET["producttype"]."'
    GROUP BY ct.customer_seq ORDER BY c.company ASC ";
$rs=mysql_query($sql,$conn) or die(mysql_error());
while($result=mysql_fetch_array($rs))
{
    // your code
}

Answer 3

您需要使用join在单个查询中执行此操作。应该是这样的：

SELECT cb.customer_seq, c.sequence, c.company, SUM(quantity*unitprice) as customertotal
FROM customer_billing AS cb JOIN customer AS c
     ON cb.sequence = c.sequence
WHERE cb.resellerid = ''
  AND cb.salesmanid = ''
  AND cb.producttype = '$_GET["producttype"]'
  AND c.company_status = ''
GROUP BY cb.customer_seq, c.company
ORDER BY c.company

PHP选择形成一个mysql表并按另一个表排序

3 个答案: