OpenCart 🇺🇦

$sql = "SELECT COUNT(DISTINCT op.model) AS total FROM `" . DB_PREFIX . "order_product` op LEFT JOIN `" . DB_PREFIX . "order` o ON (op.order_id = o.order_id)";

if (!empty($data['filter_order_status_id'])) {
	$sql .= " WHERE o.order_status_id = '" . (int)$data['filter_order_status_id'] . "'";
} else {
	$sql .= " WHERE o.order_status_id > '0'";
}

if (!empty($data['filter_date_start'])) {
	$sql .= " AND DATE(o.date_added) >= '" . $this->db->escape($data['filter_date_start']) . "'";
}

if (!empty($data['filter_date_end'])) {
	$sql .= " AND DATE(o.date_added) <= '" . $this->db->escape($data['filter_date_end']) . "'";
}

$query = $this->db->query($sql);

return $query->row['total'];