FROM stages Left Outer Join Periodes ON  stages.periode = Periodes.numro LEFT Outer Join Professeurs Professeurs_b ON  Periodes.coordo = Professeurs_b.numen LEFT Outer Join Professeurs ON  stages.suivi = Professeurs.numen LEFT Outer Join Entreprises ON  stages.entreprise = Entreprises.numro LEFT Outer Join Eleves ON  stages.eleve = Eleves.refeleve LEFT Outer Join Fraiseleves ON  stages.numro=Fraiseleves.stagiaire LEFT Outer Join codesmef ON  Eleves.specmef=codesmef.specmef LEFT Outer Join classes ON  Eleves.divcod=classes.codeclasse LEFT Outer Join editions ON  stages.numro=editions.stagiaire And "convention" $ Lower(editions.Document) And !"rdite" $ editions.Document