skydriver

<?php
global $wpdb;

$first_char = esc_attr($_GET[$search_key]);

$postids = $wpdb->get_col($wpdb->prepare("
	SELECT      ID
	FROM        $wpdb->posts
	WHERE       SUBSTR($wpdb->posts.post_title,1,1) = %s
	AND 		$wpdb->posts.post_type = 'product'