SELECT
	ost_form_entry_values.value as ost_form_entry_values__value
FROM
    ost_ticket AS t
LEFT JOIN ost_form_entry
	 ON t.ticket_id = ost_form_entry.object_id
LEFT JOIN ost_form_entry_values
	 ON ost_form_entry_values.entry_id = ost_form_entry.id
WHERE ost_form_entry_values.field_id = 20
ORDER BY
    t.created DESC
LIMIT 20;