SELECT * FROM sensorweb.leitura where id_veic='25' and dia_hora between 1723777200 and 1724074500 order by id_veic, dia_hora;

UPDATE sensorweb.leitura SET temperatura=null where id_veic='25' and dia_hora between 1723777200 and 1724074500 order by id_veic, dia_hora;