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fantasticmao/关系型数据库设计的三大范式.md

Created December 26, 2018 07:41
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关系型数据库设计的三大范式.md

关系型数据库设计的三大范式:

  • 第一范式：要求表中的每个列的值都是原子的、不可再分的；
  • 第二范式：要求表中的每个列都要和表的主键有完全依赖关系；
  • 第三范式：要求所有非主键属性都只和主键有相关性，非主键属性之间应该是独立无关的。
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