text: DELETE FROM maara_yksikko;
  
  INSERT INTO maara_yksikko (nimi, ryhma_nro) VALUES
      ('', 0),
      ('g', 1),
      ('kg', 1),
      ('mg', 1),
      ('cl', 2),
      ('dl', 2),
      ('l', 2),
      ('rkl', 3),
      ('tl', 3),
      ('ps', 4),
      ('pkt', 4),
      ('kpl', 4),
      ('tlk', 4);