DBTNG.php

<?php
// Old code, loop over a result.
while ($row = db_fetch_object($result)) { 
}

// DBTNG.
foreach ($result as $row) {
}

// Old code, fetch a single field directly from a query.
$nid = db_result(db_query('...'));

// DBTNG.
$nid = db_query('...')->fetchField();
?>