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Datenbanke Er-Modelle
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#18+
O4eni ho3etsia poniati.. kakie prinzipi postroenia ER-Modellei.Primary schlüssel und fremd schl.. mne isvestni, no esti je kakie nibudi osobennosti, kak rasposnati otnoschenia 1:n,esli imeutsia somnenia????ili k primeru n:n ,????? ... |
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| 04.09.2002, 13:14:12 |
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