$urun = $db->prepare("SELECT * FROM uretim_urun WHERE urun_id = ".$urun_isim, PDO::FETCH_ASSOC);
foreach ($urun as $urun) {}

$birim = $db->prepare("SELECT * FROM birim WHERE birim_id = ".$birim_isim, PDO::FETCH_ASSOC);
foreach ($birim as $birim) {}

?>

<tr>
<td><?php echo $hammadde_id; // Yukarıda tanıttığımız gibi alanları dolduruyoruz. ?></td>
<td><?php echo $urun["urun_isim"]; ?></td>
<td><?php echo $hammadde_adi; ?></td>
<td><?php echo $hammadde_kalitesi; ?></td>
<td><?php echo $hammadde_fatura; ?></td>
<td><?php echo $hammadde_fiyat; ?></td>
<td><?php echo $hammadde_oran; ?></td>
<td><?php echo $birim["birim_isim"]; ?></td>
<td><a href="hammadde-sil.php?id=<?php echo $hammadde_id; ?>" class="btn btn-danger">Sil</a></td>
                                </tr>