select 	a.originairport,
		a.origin, 
		b.airport_desc, 
		sum(a.departdelay) as dd, 
		count(*) 
	from 
		flightdelay as a, 
		airportid as b
	where 
		a.originairport = b.airportid
	group by a.originairport 
	order by dd desc
	limit 12;