gistfile1.txt

let result =
    seq { for p2a in produkteZuAnwendungen do
              for p in produkte do 
                if p2a.Release = p.Release && p2a.``PK-ID`` = p.``PK-ID`then
                    for p2pg in produktGruppenZuProdukte do
                        if p2a.Release = p2pg.Release &&  p2pg.``PK-ID`` = p.``PK-ID` then
                            for pg in produktGruppen do
                                if p2a.Release = pg.Release && p2pg.``PG-ID`` = pg.``PG-ID`` then
                                    yield p2a.Release, p2a.``ANW-ID``, p.``PK-ID``, p.Definition, pg.``PG-ID``, pg.Defintion }