# alle von Virgin
select L_Name, I_Name, CD_Titel, CD_Jahrgang 
	from CD, Interpret as i, Label as l
	where cd.L_ID = 3
	and cd.I_ID = i.I_ID
	and cd.L_ID = l.L_ID
	order by I_Name, CD_Titel;

# anzahl Track auf CD
select Track_Titel, count(t.CD_ID)
	from Track as t, CD
	where t.CD_ID = cd.CD_ID
	group by Track_Titel;

# gesamt mit Tracks
select I_Name, CD_Titel, CD_Jahrgang, L_Name, S_Name, Track_Nr, Track_Titel, Track_Dauer 
	from cd, interpret as i, Label as l, Standort as s, Track as T
	where cd.I_ID = i.I_ID
	and cd.L_ID = l.L_ID
	and cd.S_ID = s.S_ID
	and cd.CD_ID = t.CD_ID
	order by I_Name, CD_Titel, Track_Nr;

# Label-Zaehler
select count (l_name) from Label as l, CD
	where l.L_Name = 'Virgin'
	and cd.L_ID = l.L_ID;

# laengster Track
select max(Track_Dauer)
	from Track;

# listet Trackanzahl der CD's
select CD_Titel, count(*)
	from Track as T, CD
	where cd.CD_ID = t.CD_ID
	group by CD_Titel;