Delete old posts programmatically

I want to delete old posts programmatically.
I found smatterings of code but usually more complicated than I require.

I put this together to delete posts older than 120 days.

Will it work?

<?php
require_once ‘wp-load.php’;

global $wpdb;

$expireds = $wpdb->get_results(“SELECT * FROM $wpdb->posts WHERE DAY(TIMEDIFF(NOW(), post_date_gmt)) >=120”);

foreach ($expireds as $expired) {
wp_delete_post($post->id, true);
}
?>