重复循环 - PHP/MySQL

Question

基本上我遇到了一个我似乎无法弄清楚的问题。我正在运行一个循环来检查数据库中的特定值并将它们显示在一个表中。除了存在重复值之外，表格显示正常吗？

名为 IR_Logs 的主表仅包含 2 行，用作以下代码的连接表。

$SQL     = "SELECT ID, ItemID FROM IR_Logs";
$data    = $db->getResults($SQL);

$count   = mysql_num_rows($data);
echo '<p>Returned Results: '.$count.'</p>';

while($row = mysql_fetch_array($data)){
$ItemID     = $row[1];
$LocationID = $db->getValue("SELECT LocationID FROM IR_Logs WHERE ItemID = $ItemID");

$SQL          = "SELECT SiteManager, CompanyID, Reference FROM Customer_Sites WHERE Customer_Sites.ID = $LocationID";
$LocationData = $db->getResults($SQL);

while($row2= mysql_fetch_array($LocationData)){
    $SiteManagerID = $row2[0];
    $CompanyID     = $row2[1];
    $SiteReference     = $row2[2];

    $SQL         = "SELECT Name, Telephone, Email FROM Customer_Users WHERE CompanyID = $CompanyID AND ID = $SiteManagerID";
    $ManagerData = $db->getResults($SQL);

    while($row3 = mysql_fetch_array($ManagerData))
    {
        $Manager_Name      = $row3[0];
        $Manager_Telephone = $row3[1];
        $Manager_Email     = $row3[2];

        $SQL               = "SELECT (SELECT Reference FROM Inventory WHERE ID = ItemID), (SELECT Company FROM Customer_Accounts WHERE ID = CompanyID), (SELECT Reference FROM Customer_Sites WHERE ID = LocationID), Type, DATE_FORMAT(Date, '%d %M %Y'), CompanyID, LocationID FROM IR_Logs WHERE LocationID = $LocationID ORDER BY CompanyID ASC";
        $LogData           = $db->getResults($SQL);

        if(mysql_num_rows($LogData) <> 0){
            $HQEmail = $db->getValue("SELECT PrimaryEmail FROM Customer_Accounts WHERE ID = $CompanyID");
            $message .= '<h3>Site Ref: '.$SiteReference.'</h3>';
            $message .= '<p>For the Attention of '.$Manager_Name.', in regards to Site Reference: '.$SiteReference.'</p>';
            $message .= $blk->GetBlock(6);

            $message .= '<table style="border:1px solid black; padding: 10px;" cellpadding="10">';
            $message .= '<tr>';
            $message .= '<td><strong>Reference</strong></td>';
            $message .= '<td><strong>Type</strong></td>';
            $message .= '<td><strong>Date</strong></td>';
            $message .= '</tr>';

            while($row4 = mysql_fetch_array($LogData)){
                $Reference = $row4[0];
                $Location  = $row4[2];
                $Company   = $row4[1];
                $Type      = $row4[3];
                $Date      = $row4[4];
                $CompanyID = $row4[5];
                $LocationID= $row4[6];

                $message .= '<tr>';
                $message .= '<td>'.$Reference.'</td>';
                $message .= '<td>'.$Type.'</td>';
                $message .= '<td>'.$Date.'</td>';
                $message .= '</tr>';
            }
            $message .= '</table>';
        }


    }
}

}

Answer 1

使用连接会更容易跟踪，并且担心您没有说哪个字段给出了重复。

例如，以下是对您的代码的快速破解（未经测试），以消除一些单独的选择：-

<?php

$SQL     = "SELECT ID, ItemID FROM IR_Logs";
$data    = $db->getResults($SQL);

$count   = mysql_num_rows($data);
echo '<p>Returned Results: '.$count.'</p>';

while($row = mysql_fetch_assoc($data))
{
    $ItemID     = $row['ItemID'];
    $SQL          = "SELECT cs.SiteManager, cs.CompanyID, cs.Reference, cu.Name, cu.Telephone, cu.Email
                FROM IR_Logs ir 
                INNER JOIN Customer_Sites cs ON ir.LocationID = cs.ID
                INNER JOIN Customer_Users cu ON cs.CompanyID = cu.CompanyID AND cu.ID = cs.SiteManager";
    $LocationData = $db->getResults($SQL);

    while($row2= mysql_fetch_assoc($LocationData))
    {
        $SiteManagerID = $row2['SiteManager'];
        $CompanyID     = $row2['CompanyID'];
        $SiteReference     = $row2['Reference'];
        $Manager_Name      = $row3['Name'];
        $Manager_Telephone = $row3['Telephone'];
        $Manager_Email     = $row3['Email'];

        $SQL               = "SELECT i.Reference, ca.Company, cs.Reference, a.Type, DATE_FORMAT(a.Date, '%d %M %Y'), a.CompanyID, a.LocationID 
                                FROM IR_Logs a
                                LEFT OUTER JOIN Inventory i ON a.ItemID = i.ID
                                LEFT OUTER JOIN Customer_Accounts ca ON a.CompanyID = ca.ID
                                LEFT OUTER JOIN Customer_Sites cs ON a.LocationID = cs.ID
                                WHERE a.LocationID = $LocationID 
                                ORDER BY CompanyID ASC";
        $LogData           = $db->getResults($SQL);

        if(mysql_num_rows($LogData) <> 0){
            $HQEmail = $db->getValue("SELECT PrimaryEmail FROM Customer_Accounts WHERE ID = $CompanyID");
            $message .= '<h3>Site Ref: '.$SiteReference.'</h3>';
            $message .= '<p>For the Attention of '.$Manager_Name.', in regards to Site Reference: '.$SiteReference.'</p>';
            $message .= $blk->GetBlock(6);

            $message .= '<table style="border:1px solid black; padding: 10px;" cellpadding="10">';
            $message .= '<tr>';
            $message .= '<td><strong>Reference</strong></td>';
            $message .= '<td><strong>Type</strong></td>';
            $message .= '<td><strong>Date</strong></td>';
            $message .= '</tr>';

            while($row4 = mysql_fetch_array($LogData)){
                $Reference = $row4[0];
                $Location  = $row4[2];
                $Company   = $row4[1];
                $Type      = $row4[3];
                $Date      = $row4[4];
                $CompanyID = $row4[5];
                $LocationID= $row4[6];

                $message .= '<tr>';
                $message .= '<td>'.$Reference.'</td>';
                $message .= '<td>'.$Type.'</td>';
                $message .= '<td>'.$Date.'</td>';
                $message .= '</tr>';
            }
            $message .= '</table>';
        }
    }
}

?>