php sqlチェックボックスがオンになっているときにクエリを取得する

Question

SQLでカラムの値を取得する方法を知りたかっただけですが、チェックボックスをオンにすると、数値なので値が加算されます。

SEARCH = Dan 

    ----------------------- 
    name | date | Total | Checkbox 
    ------------------------------------- 
    Dan | dd/mm/yyy | 200 | checked 
    Dan | dd/mm/yyy | 400 | checked 
    Dan | dd/mm/yyy | 300 | checked 
    Dan | dd/mm/yyy | 250 | unchecked 
    Dan | dd/mm/yyy | 260 | unchecked 

TOTAL AMOUNT = 900 

UPDATEを追加

表名

データ=：ここでは私がこれまで行ってきたコードだし、それはまだ働いていません。

<?php 

      include "connection.php"; 

       //$searchName= $_POST['submit']; 


       if(isset($_POST['submit'])){ 
        $searchName = $_POST['submit']; 

        $searchName = preg_replace("#[^0-9a-z]#i","",$searchName); 

        $query = "SELECT * FROM adding where Code LIKE '$searchName%' ORDER BY Date"; 
        $result = mysql_query($query); 

        if(mysql_num_rows($result)>0){ 
         echo "<form action=Payment.php method=get>";        
         echo "<table border='1'> 
         <tr> 
         <th>Name</th> 
         <th>Date</th> 
         <th>Total</th> 
         <th>Checkbox</th> 
         </tr>"; 
         while($row = mysql_fetch_array($result)){ 
          //$idno = $row['id']; 

          echo "<tr>"; 
          echo "<td>" . $row['Code'] . " </td>"; 
          echo "<td>" . $row['Date'] . "</td>"; 
          echo "<td>" . $row['Total'] . "</td>"; 
          echo "<td><input type = \"checkbox\" name=\"pay[]\" value='{$row['id']}' ></td>"; 
          echo "</form>"; 
         } 
         echo "<table>"; 
         echo "<input type=\"submit\" name =\"button2\" value=\"Submit\">"; 
         echo "</form>"; 

         if(isset($_GET['pay'])){ 

          $checked=$_GET("pay"); 
          $c= count($checked); 
          $totalpayment = $row['Total']; 

          for($i=0;$i<$c;$i++){ 
           if($checked[$i]==$row['id']){ 
            $totalpayment = $totalpayment+$row['Total']; 
           } 
          } 
          echo "total is: " .$totalpayment. "<br>"; 

         } 


        } 
        else{ 
         echo "RECORD NOT FOUND!"; 
        } 




       } 

       mysql_free_result($result); 


      ?> 

Answer 1

この

select sum(total) as TOTAL AMOUNT from table 
where Checkbox='checked'