PLOT DATETIMEYCHART
  X, LIGHT BLUE VERTICK, SIZE OVERRIDE
  WITH
    FOREGROUND GRAY
    SCALE Y 0 20 20
    SCALE X '2009-04-13 00:00:00' '2009-04-13 24:00:00' 2 HOURS
    NO YAXIS
    NO SIDES
    LABELANGLE 0
    FORMAT X "%H"
    PAGE FOURTH
SELECT
  dtime, 10, 20 
  FROM ACCESS
  WHERE DAY(dtime) = '13';