有什么不对的，而循环？ [英] Is something wrong in the while loop?

问题描述

我有一个store_credits_orders表

I have a store_credits_orders table

和订单表。

这是我想要的输出与此类似，但根据店铺信用秩序的日期和时间和商店订购日期和时间：

The output that I want is similar to this but based on Store Credit Order Date and Time and Store Order Date and Time:

在code，我到目前为止已经试过：

The code that I have tried so far:

<?php
$table = '';
$queryToGetStoreCredit = "SELECT * FROM store_credits_orders WHERE SCO_CustEmailAdd = '".$_SESSION["Customer"]["email"]."'";
$validate->Query($queryToGetStoreCredit);
if ($validate->NumRows() >= 1) {
    while ($rows_sco = $validate->FetchAllDatas()) {
        $used = $i = 0;
        $table .= '<tr>';
        $table .= '<td>'.$rows_sco["SCO_OrderCode"].'</td>';
        $table .= '<td>--</td>';
        $table .= '<td>'.$rows_sco["SCO_OrderDate"].'</td>';
        $table .= '<td>--</td>';
        $table .= '<td>'.$rows_sco["SCO_Purchase_Amount"].'</td>';
        $table .= '<td>'.$rows_sco["SCO_Credit_Alloted"].'</td>';
        $table .= '<td>'.$used.'</td>';
        $table .= '<td>'.( $rows_sco["SCO_Credit_Alloted"] - $used ).'</td>';
        $table .= '</tr>';

        $validate2 = new Validation();
        $queryToGetOrder = "SELECT * FROM orders WHERE CustEmailAdd = '".$rows_sco["SCO_CustEmailAdd"]."'";
        $validate2->Query($queryToGetOrder);
        while ($row = $validate2->FetchAllDatas()) {
            $table .= '<tr>';
            $table .= '<td>--</td>';
            $table .= '<td>'.$row["OrderCode"].'</td>';
            $table .= '<td>--</td>';
            $table .= '<td>'.$row["OrderDate"].'</td>';
            $table .= '<td>--</td>';
            $table .= '<td>--</td>';
            $table .= '<td>'.$row["AppliedCredits"].'</td>';
            $table .= '<td>'.($rows_sco["SCO_Credit_Alloted"] - $row["AppliedCredits"]).'</td>';
            $table .= '</tr>';
        }
    }
}
?>

我想实现的是，每当有购买store_credits，信息将被插入在 store_credits_orders 表。现在，当同一个用户来了，下单和赎回store_credits（大于等于，他在他的帐户具有更低），将有比在插入订单表中的其他数据库没有更新。

What I want to achieve is, whenever there is a purchase of store_credits, the information will get inserted in the store_credits_orders table. Now when the same user comes, places an order and redeems the store_credits (less than equal to, he has in his account), there will be no update in the database other than insertion in the orders table.

但是，当用户登录时，他应该能够看到，当他已经购买了store_credits和/或当他赎回store_credits。所有这些活动应该由哪个事件发生第一次下令，不论购买或赎回。

But when the user logs in, he should be able to see when he has purchased the store_credits and/or when he has redeemed the store_credits. All these events should be ordered by whichever event happens first, irrespective of purchase or redeem.

推荐答案

我跟@ user3514160，我得到了清晰，他想的有什么。数据基本上被正确插入。只有他想的是按照正确的方式来显示数据。

I talked to @user3514160 and I got clarity what he want's to have. Basically data gets inserted correctly. Only thing he wants is to show data in correct way.

您的查询应该是这样的。

(SELECT
  SCO_Id,
  SCO_OrderCode,
  SCO_CustEmailAdd,
  SCO_Purchase_Amount,
  SCO_Credit_Alloted,
  SCO_OrderDate,
  SCO_OrderIP,
  null AS OrderId,
  null AS OrderCode,
  null AS CustEmailAdd,
  null AS AppliedCredits,
  null AS OrderDate,
  'store_credits_orders' AS tableName
FROM `store_credits_orders` AS credits_orders WHERE `SCO_CustEmailAdd` = '".$_SESSION["Customer"]["email"]."')
UNION
(SELECT
  OrderId,
  OrderCode,
  CustEmailAdd,
  AppliedCredits,
  OrderDate
  null AS SCO_Id,
  null AS SCO_OrderCode,
  null AS SCO_CustEmailAdd,
  null AS SCO_Purchase_Amount,
  null AS SCO_Credit_Alloted,
  OrderDate AS SCO_OrderDate,
  null AS SCO_OrderIP,
  'store_orders' AS tableName
FROM `store_orders` AS orders WHERE `SCO_CustEmailAdd` = '".$_SESSION["Customer"]["email"]."')
ORDER BY `SCO_OrderDate` ASC

这是需要得到一个结果的所有行。我们做到这一点与 MySQL的UNION 。

This is needed to get all rows in one result. We accomplish this with MySQL UNION.

UNION需要两个表有有相同的名字列相同。这就是为什么我们添加空列与 NULL作为COLUMNNAME 。

UNION needs both tables to have same amount of columns with same names. This is why we add empty columns with null AS columnName.

和 PHP 与查询

<?php
$table = '<table>';

// Query to get all rows from both tables
$queryToGetStoreCredit = 
"(SELECT
  SCO_Id,
  SCO_OrderCode,
  SCO_CustEmailAdd,
  SCO_Purchase_Amount,
  SCO_Credit_Alloted,
  SCO_OrderDate,
  SCO_OrderIP,
  null AS OrderId,
  null AS OrderCode,
  null AS CustEmailAdd,
  null AS AppliedCredits,
  null AS OrderDate,
  'store_credits_orders' AS tableName
FROM `store_credits_orders` AS credits_orders WHERE `SCO_CustEmailAdd` = '".$_SESSION["Customer"]["email"]."')
UNION
(SELECT
  OrderId,
  OrderCode,
  CustEmailAdd,
  AppliedCredits,
  OrderDate
  null AS SCO_Id,
  null AS SCO_OrderCode,
  null AS SCO_CustEmailAdd,
  null AS SCO_Purchase_Amount,
  null AS SCO_Credit_Alloted,
  OrderDate AS SCO_OrderDate,
  null AS SCO_OrderIP,
  'store_orders' AS tableName
FROM `store_orders` AS orders WHERE `SCO_CustEmailAdd` = '".$_SESSION["Customer"]["email"]."')
ORDER BY `SCO_OrderDate` ASC";

$validate->Query($queryToGetStoreCredit);
if ($validate->NumRows() >= 1) {
    // Starting balance. This could be some other number, for example if viewing some certain period of orders etc.
    $balance = 0;
    while ($row = $validate->FetchAllDatas()) {

        // Add to balance
        if($row['tableName'] == 'store_credits_orders' && (int)$row['SCO_Credit_Alloted'] > 0){
          $balance += (int)$row['SCO_Credit_Alloted']
        }
        // Remove from balance
        else if($row['tableName'] == 'store_orders' && (int)$row['AppliedCredits'] > 0){
          $balance -= (int)$row['AppliedCredits'];
        }

        $table .= '<tr>';
        $table .= '<td>'.$row["SCO_OrderCode"].'</td>';
        $table .= '<td>'.$row["OrderCode"].'</td>';
        $table .= '<td>'.(($row['tableName'] == 'store_credits_orders') ? $row["SCO_OrderDate"] : '').'</td>';
        $table .= '<td>'.$row["OrderDate"].'</td>';
        $table .= '<td>'.$row["SCO_Purchase_Amount"].'</td>';
        $table .= '<td>'.$row["SCO_Credit_Alloted"].'</td>';
        $table .= '<td>'.$row["AppliedCredits"].'</td>';
        $table .= '<td>'.$balance.'</td>';
        $table .= '</tr>';
    }
}

$table .= '</table>';

echo $table;
?>

让我知道，如果有一些问题。

Let me know, if there is some problems.

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