my if condition didnt work with php

<?php

$batas = 5;
$halaman = @$_GET['halaman'];
    if(empty($halaman)){
        $posisi = 0;
        $halaman = 1;
    } else{
        $posisi = ($halaman - 1) * $batas;
}
$query = mysqli_query($con, "select * from schedule where status='PROCESS'");
$sql = mysqli_query($con, "select * from schedule LIMIT $posisi, $batas");

$jumlah = mysqli_num_rows($query);
$jumlahhalaman = ceil($jumlah/$batas);

if(mysqli_num_rows($sql) > 0){
$no = $posisi + 1;
$urut = 1;
while($sched = mysqli_fetch_array($sql)){
if($sched['status']=='PROCESS'){
    echo "
<tr style='cursor: pointer;'>
        <td>$no</td>
        <td>$sched[name]</td>
        <td>$sched[address]</td>
        <td style='color:red'>$sched[status]</td>
        <td><button type='button' class='btn btn-default' data-toggle='modal' data-target='#myModal$no'>Edit</button>
            <a href='#'><button type='delete' class='btn btn-default' >delete</button></a></td>
</tr>" ;}
    $no++;
    } 
}
  ?>