text: select
  	strftime('%m', a.month_start) as week,
  	strftime('%Y', a.month_start) as y,
  	a.month_start as month_start,
  	a.monthly_value as monthly_value
  from (
  	select
  	  (date(date(gekauftUm), 'start of month')) month_start,
  	  sum (verkaufspreis)/100.0 as monthly_value
  	from kiosk_gekauft a
  	join profil_kioskuser b
  	  on a.kaeufer_id = b.id
  	where b.username <> "Dieb"
  	group by month_start
  	order by month_start asc
  ) a
  where month_start > datetime(datetime('now'), '-2 year')