stop looping while

pagi semuanya, saya bikin looping while pake fetch array di php, gimana cara stop while kalau data sudah ter-fetch semua ?

<form method="POST" action="storedata_g6b.php">
  <table class="table">
    <thead class="thead-dark">
      <tr>
        <th class="col-3">id</th>
        <th class="col-7">nama</th>
        <th class="col-3">rank</th>
      </tr>
    </thead>
    <tbody>
      <?php
        $rank_b = 'B';
        $sql = "select t_empeval.id, t_empeval.nama from t_empeval Where t_empeval.grade='$c' and sect=CONCAT('$a','$b') order by t_empeval.v1 desc limit ".$var1.",".$var2."";
        $query = mysqli_query($koneksi, $sql);
        if(!$query)
        {
          die('SQL Error' . mysqli_error($koneksi));
        }
        $i=0;
        while ($array_b = mysqli_fetch_assoc($query))
        {
          if(mysqli_num_rows($query) > 0)
            {
      ?>
          <tr>
            <td><input type="text" name="id_b[<?php echo $b; ?>]" value="<?php echo $array_b['id']; ?>"></td>
            <td><input type="text" name="nama_b[<?php echo $b; ?>]" value="<?php echo $array_b['nama']; ?>"></td>
            <td><input type="text" name="rank_b[<?php echo $b; ?>]" value="<?php echo $rank_b; ?>"></td>
         </tr>
        $i++;
        }
      }
     <input type="hidden" name="cotton_b" value="<?php echo $b; ?>" />
   </tbody>
 </table>
 <input type="submit" id="submit" name="submit"/>
 </form>

mohon bantuannya untuk yang lebih paham. Terimakasih banyak