รบกวนผู้รู้ด้วยครับ ผมจะ select * from inner join อ่านค่าแบบ id

        include 'connectdb.php';
           $id = $_GET['id'];
           $sql = "SELECT * FROM article INNER JOIN a_type ON article.select _type=a_type.select_type WHERE  id = $id ";
           $result = mysqli_query($dbcon,$sql);
                while($row = mysqli_fetch_assoc($result)) {
                        $topic = $row['topic'];
                        $type =  $row['name_type'];

                   <div class="topic"><?php echo $topic ?></div>
                   <span class="category"><?php echo $type ?></span>

        <?php } ?>