public function update()
 {
     $value = 250;
     $date = date('Y-m-d h:i:s');
     $intId = 141;
     $sql = "UPDATE meta\n                 SET met_fecCreacion=:date, met_valor=:value\n                 WHERE met_id=:id";
     $objConection = new Conection();
     $objConection->query($sql);
     $objConection->bind(':date', $date);
     $objConection->bind(':value', $value);
     $objConection->bind(':id', $intId);
     if ($objConection->execute() == 1) {
         return true;
     }
     return false;
 }