Question 2 - Dépendances fonctionnelles
AlbumId --> Title, ArtistId
ArtistId --> Name
TrackId --> Name, Composer, AlbumId, MediaTypeId, GenreId, Milliseconds, Bytes, UnitPrice
MediaTypeId --> Name
GenreId --> Name
PlaylistId + TrackId --> /
InvoiceId + TrackId --> UnitPrice, Quantity
InvoiceId --> CustomerId, InvoiceDate, BillingAddress, BillingCity, BillingState, BillingCountry, BillingPostalcode, total
CustomerId --> Firtsname, Lastname,... SupportRepId
Employee --> LastName, FirstName,... Email