數據庫設計（第一、二、三範式區別）

原創 绯火琉瞳 2020-06-26 13:18

 區別記憶

1NF：每個列不可再拆分（屬性越細越好）

2NF：滿足1NF，且除主鍵外的其他列，都依賴於主鍵，（實體越細越好，減少數據冗餘）

3NF：滿足2NF，且不傳遞依賴於主鍵列（唯一標識）

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