Query 2

 

query2.ddf:

# union query description
query2(CD) :- exam_record("09089903",C,X0,X1,X2,X3,X4), course(C,CD).
 

query2.rew:

#import(demo,"dlv","dlv","SELECT MATRICOLA, CODICE_INSEGNAMENTO, CODICE_ESAME, DATA, VOTO, REGOLARITA, ANNO_ACCADEMICO FROM dati_esami",dati_esami).
#import(demo,"dlv","dlv","SELECT CODICE_ESAME, CODICE_PROFESSORE, ANNO_ACCADEMICO FROM affidamenti_ing_informatica",affidamenti_ing_informatica).
#import(demo,"dlv","dlv","SELECT CODICE, NOME, COGNOME FROM dati_professori",dati_professori).
#import(demo,"dlv","dlv","SELECT CODICE_FACOLTA, CODICE, DESCRIZIONE, ATTIVAZIONE FROM esame",esame).
#import(demo,"dlv","dlv","SELECT CODICE, DESCRIZIONE FROM esame_diploma",esame_diploma).
course(X1,X2):-courseD(X1,X2),not courseCOMPL(X1,X2).
exam_recordCOMPL(X1,X2,X3,X4,Y5,Y6,Y7) v exam_recordCOMPL(X1,X2,X3,X4,Z5,Z6,Z7) :- exam_recordD(X1,X2,X3,X4,Y5,Y6,Y7),exam_recordD(X1,X2,X3,X4,Z5,Z6,Z7),Y5<>Z5.
exam_recordCOMPL(X1,X2,X3,X4,Y5,Y6,Y7) v exam_recordCOMPL(X1,X2,X3,X4,Z5,Z6,Z7) :- exam_recordD(X1,X2,X3,X4,Y5,Y6,Y7),exam_recordD(X1,X2,X3,X4,Z5,Z6,Z7),Y6<>Z6.
exam_recordCOMPL(X1,X2,X3,X4,Y5,Y6,Y7) v exam_recordCOMPL(X1,X2,X3,X4,Z5,Z6,Z7) :- exam_recordD(X1,X2,X3,X4,Y5,Y6,Y7),exam_recordD(X1,X2,X3,X4,Z5,Z6,Z7),Y7<>Z7.
exam_record(X1,X2,X3,X4,X5,X6,X7):-exam_recordD(X1,X2,X3,X4,X5,X6,X7),not exam_recordCOMPL(X1,X2,X3,X4,X5,X6,X7).
courseD(X1,X2):-esame(A_1,X1,X2,A_2).
courseD(X1,X2):-esame_diploma(X1,X2).
exam_recordD(X1,X2,Z,W,X4,X5,Y):-affidamenti_ing_informatica(X2,X3,Y),dati_esami(X1,A_1,X2,X5,X4,A_2,Y),dati_professori(X3,Z,W).
query2(CD):-course(C,CD),exam_record("09089903",C,_,_,_,_,_).
query2(CD)?
#export(demo ,"dlv", "dlv", query2, query2).
 
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