数据库设计（第一、二、三范式区别）

原創 绯火琉瞳 2020-06-26 13:18

 区别记忆

1NF：每个列不可再拆分（属性越细越好）

2NF：满足1NF，且除主键外的其他列，都依赖于主键，（实体越细越好，减少数据冗余）

3NF：满足2NF，且不传递依赖于主键列（唯一标识）

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