ใบแสดงสถานะการแจ้งซ่อม จะให้แสดงเฉพาะที่ซ่อมเสร็จแล้ว ยังไรค่ะ

<?php include('connect.php'); ?>
      <div class="content-wrapper">
        <br/>
        <section class="content-header">
          <h1>
            ใบแจ้งซ่อม           
          </h1>          
        </section>
        <section class="content">
      <div class="CSSTableGenerator" >
          <table >
            <tr>
                <td>ลำดับ</td>
                <td>เลขที่</td>                
                <td>ชื่อลูกค้า</td>             
                <td>ผู้ซ่อม</td>
                <td>สถานะ</td>
                <td>วันที่ซ่อม</td>
                <td>แสดง</td>               
            </tr>           
              <?php 
              	$sql="SELECT DISTINCT tb_repair.repair_no AS summary, Sum(tb_repair.repair_total) AS total,
					tb_customer.cust_fname,
					tb_staff.employee_name,
					tb_repair.repair_status,
				Max(tb_repair.repair_date) AS repair_date
				FROM tb_repair
					INNER JOIN tb_customer ON tb_repair.customer_id = tb_customer.customer_id
					INNER JOIN tb_staff ON tb_repair.employee_id = tb_staff.employee_id
				GROUP BY
					tb_repair.repair_no,
					tb_customer.cust_fname,
					tb_staff.employee_name,
					tb_repair.repair_status
				order by repair_date desc";             
        $result=$cls_con->select_base($sql);
        $i=1;
        while($row =mysqli_fetch_array($result))
              {             
              ?>
              <tr>
                <td><?=$i++;?></td>                    
                <td><?=$row['summary'];?></td> 
                <td><?=$row['cust_fname'];?></td>                
                <td><?=$row['employee_name'];?></td>				
				<td><?=$row['repair_status'];?></td>
                <td><?=$row['repair_date'];?></td>				
                <td><a href="repairdone.php?id=<?=$row['summary'];?>"target="_blank"><img src="../images/seepdf.png" /></a></td> 
              </tr>
              <?php } ?>       
          </table>
      </div>
        </section>
      </div> 
<?php include('footer.php'); ?>