Remove Orphan values from post-meta Table in WordPress

remove-post-meta-orphans.php

<ol><?php 
$link = mysqli_connect("localhost","Username","Password","DBNameHere");

$sql = "SELECT `meta_id`,`post_id`,`meta_key`,Length(`meta_value`) as meta_data, `post_title`, `post_type` FROM `wp_postmeta` LEFT JOIN `wp_posts` on `wp_postmeta`.`post_id` = `wp_posts`.`ID` ORDER BY `wp_posts`.`post_title` ASC ";

$result = mysqli_query($link, $sql);

while($data = mysqli_fetch_assoc($result)){

	if($data['post_title'] == NULL && $data['post_type'] == NULL){
			$meta_id = $data['meta_id'];
			$sql = "DELETE FROM `wp_postmeta` WHERE `meta_id` = ".$meta_id;
			$res2 = mysqli_query($link, $sql);

		echo "<li>".$data['post_id']."- Type: ".$data['post_type']."</li>";
	}

}
?>
</ol>