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.dsy:it. : Powered by vBulletin version 2.3.1 .dsy:it. > Didattica > Corsi A - F > Basi di dati ~ informatica triennale > esercizio
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delpiero
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Registered: Jul 2008
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 esercizio

chi mi può correggere le interrogazioni ???

Attachment: eserciziar.pdf
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12-07-2008 08:53
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delpiero
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Registered: Jul 2008
Posts: 14 (0.00 al dì)
Location: milano
Corso: informatica
Anno: 3
Time Online: 4:51:04: [...]
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1) Visualizzare i nomi di tutti gli autori di nazionalità italiana
∏nome (σnazionalità = 'italiana' AUTORE);
2) visualizzare le librerie di Roma : è simile a quella precedente
∏nome (σ città = 'Roma' LIBRERIA);
12-07-2008 08:57
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delpiero
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Selezionare l'editore del libro 'Basi di Dati'. Simile alle precedenti.
∏editorre(σtitolo = 'Basi di dati' LIBRO)
12-07-2008 09:01
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delpiero
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Registered: Jul 2008
Posts: 14 (0.00 al dì)
Location: milano
Corso: informatica
Anno: 3
Time Online: 4:51:04: [...]
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Trovare i libri scritti da Umberto Eco :
(∏titolo(∏titolo,codice LIBRO)
*
(∏codL SCRITTO)
*
(∏codA(σcognome = 'ECO'(σnome = 'UMBERTO' AUTORE))))
12-07-2008 10:35
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