sprawdź jeszcze

SELECT a.userid, period, FROM_UNIXTIME(datefrom), FROM_UNIXTIME(dateto) FROM assignments a, tariffs t, users u WHERE u.id = a.userid AND t.id = a.tariffid AND deleted =0 AND t.name ='Internet'

-- Pozdrawiam Aleksander Machniak http://k27.prv.pl/alec gg-2275252