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Normalizacija - vežbe

Normalizacija - vežbe. Primer 1. 1 NF zahteva da svaki atribut ima atomske vrednosti – Šifra_predmeta, Predmet_ime i ocena ne ispunjavaju uslove. INSERT anomalije UPDATE anomalije DELETE anomalije. Primer 1. 1 NF. Tabela STUDENT I. Primer 1. Tabela STUDENTI. 1 NF. Tabela ISPITI.

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Normalizacija - vežbe

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  1. Normalizacija - vežbe

  2. Primer 1 • 1 NF zahteva da svaki atribut ima atomske vrednosti – Šifra_predmeta, Predmet_ime i ocena ne ispunjavaju uslove

  3. INSERT anomalije UPDATE anomalije DELETE anomalije Primer 1 • 1 NF Tabela STUDENTI

  4. Primer 1 Tabela STUDENTI • 1 NF Tabela ISPITI

  5. Primer 1 • 2 NF – značajna za relacije čiji primarni ključ sadrži više atributa • Šifra_predmeta Predmet_ime a to nije dozvoljeno Tabela ISPITI

  6. Primer 1 • 2 NF Tabela PREDMETI Tabela ISPITI

  7. Primer 1 • 3 NF zabranjuje posredne zavisnosti – atribut mora da zavisi od primarnog ključa ali ne i od nekog drugog atributa koji nije ključ • Šifra_smeraRukovodilac_ime Tabela STUDENTI

  8. Primer 1 • 3 NF Tabela STUDENTI Tabela SMEROVI

  9. Primer 1 • Povezivanje tabela

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