题目内容

for / is / a / act / thinking / yourself / still / radical

查看答案

搜索结果不匹配？点我反馈

更多问题

told / that / was / how / can / each / to / for / I / him / it / about / people / help / other / think / themselves

teacher / and / the / between / fingers / the / paced / rubbed / chalk / he

I / the / with / and / examined / valued / but / took / message / me / gradually / and / it

下列关于数据库范式说法正确的是（）

A. 1NF遵从原子性和唯一性
B. 2NF要求非主键字段需要依赖主键
C. 3NF要求非主键字段不能相互依赖
D. 以上说法全部正确