Basi di dati
Basi di dati
Basi di dati
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<strong>Basi</strong> <strong>di</strong> <strong>dati</strong> - Modelli e linguaggi <strong>di</strong> interrogazione- Paolo Atzeni, Stefano Ceri, Stefano Paraboschi, Riccardo TorloneCapitolo 3PROJ Matr,Nome,Stip,MatrC,NomeC,StipC(SEL Stip>StipC (REN MatrC,NomeC,StipC,EtàC ← Matr,Nome,Stip,Età (Imp)JOIN MatrC=Capo(Sup JOIN Imp=Matr Imp)))Capi := ImpPROJ Imp.Matr, Imp.Nome, Imp.Stip,Capi.Matr,Capi.Nome, Capi.Stip(SEL Imp.Stip>Capi.Stip (Capi JOIN Capi.Matr=Capo (Sup JOIN Imp=Imp.Matr Imp)))24/09/2002Copyright © 2002 - The McGraw-Hill Companies, srl
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