@let CCOURS:COURS WHERE Prof="Mens"
@print CCOURS:
@let PROF:COURS PROJECT Prof
@print PROF:
@let DETAILS:COURS JOIN NOTES
@print DETAILS:
@let COURS2:COURS RENAME Nom AS Nom_cours
@print COURS2:
@let C2000_2001:COURS UNION COURS2001
@print C2000_2001:
@let DIFF_C:COURS2001 MINUS COURS
@print DIFF_C: