Animal: <nomEspeceNOTNULL> AND Projection(Espece,nomEspece)=Projection(Animal,nomEspece)
//////////Projection(Medicament,nom)=Projection(Espece_Medicament,nomMolec) AND Projection(Espece,nomEspece)=Projection(Espece_Medicament,nomEspece)
Projection(Medicament,nom)=Projection(Espece_Medicament,nomMolec) AND Projection(Espece,nomEspece)=Projection(Espece_Medicament,nomEspece)
//////////Projection(Medicament,nom)=Projection(Traitement_Medicament,medicament) AND Projection(Traitement,nom)=Projection(Traitement_Medicament,traitement)
Projection(Medicament,nom)=Projection(Traitement_Medicament,medicament) AND Projection(Traitement,nom)=Projection(Traitement_Medicament,traitement)
Jointure(Projection(Assistant, nom, prenom), Projection(Veterinaire, nom, prenom), Assistant.nom=Veterinaire.nom and Assistant.prenom=Veterinaire.prenom) doit être vide