2006 : MySQL server has gone away
(SELECT id, number_rooms, rent_type, area, floor, all_floors, street, house, address_area, address_area_micro, address_area_zhk, price, text, foto, agency, date from cherepovets_komnaty_arenda where moderated is not null and number_rooms >= 0 and number_rooms = 2 and street = 'Мамлеева' order by date desc, id desc LIMIT 7 ) UNION ALL (SELECT id, number_rooms, rent_type, area, floor, all_floors, street, house, address_area, address_area_micro, address_area_zhk, price, text, foto, agency, date from cherepovets_komnaty_arenda where moderated is not null and number_rooms >= 0 ORDER BY RAND() LIMIT 7 )
Error in sql