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Dec 11th, 2019
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  1. SELECT klienci.nazwisko
  2. FROM klienci, zamowienia, ksiazki_zamowione, ksiazki
  3. WHERE klienci.klient_id=zamowienia.klient_id
  4. AND zamowienia.zamowienie_id=ksiazki_zamowione.zamowienie_id
  5. AND ksiazki_zamowione.isbn=ksiazki.isbn
  6. AND ksiazki.tytul LIKE '%C++%'
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