Neznalost-->count

$dochazka= "SELECT  program, count(odprac_h) AS 'Odpracované h.' FROM dochazka WHERE program = '" . $program ."'";
     $ukaz = $db->query($dochazka);
     echo('<table class="table table-hover">
            <tbody>
             <tr>
              <td>Program</td>
              <td>Odpracované h.</td>
             </tr>
            </tbody>');
         while($row = $ukaz -> fetch_assoc())
         {
          echo ("<form method=\"post\">
                   <tr>
                    <td>". $row['program'] ."</td>
                    <td>".$row['count(odprac_h)']."</td>
                   </tr>
                 </form>
                 </table>");
         }

$program=$_POST['program'];
     $mesic =$_POST['mesic'];
    if(isset($_POST['program']))
    {
     $dochazka_p= "SELECT  program, sum(odprac_h) AS 'Odpracované h.' FROM dochazka WHERE program = '" . $program ."'";
     $ukaz_p = $db->query($dochazka_p);
     while($row_p = $ukaz_p -> fetch_assoc())
     {
      echo ("<table class=\"table table-hover\">
              <tbody>
               <tr>
                <td>Program</td>
                <td>Odpracované h.</td>
               </tr>
              </tbody>
               <tr>
                <td>". $row_p['program'] ."</td>
                <td>".$row_p['Odpracované h.']."</td>
               </tr>
              </table>");
     } 
    }
    else if(isset($_POST['mesic']))
    {
      $dochazka_m= "SELECT  mesic, sum(odprac_h) AS 'Odpracované h.' FROM dochazka WHERE mesic = '" . $mesic ."'";
      $ukaz_m = $db->query($dochazka_m);
      while($row_m = $ukaz_m -> fetch_assoc())
     {
      echo ("<table class=\"table table-hover\">
              <tbody>
               <tr>
                <td>Měsíc</td>
                <td>Odpracované h.</td>
               </tr>
              </tbody>
              <tr>
               <td>". $row_m['mesic'] ."</td>
               <td>".$row_m['Odpracované h.']."</td>
              </tr>
            </table>");
    }
   }