2. 计算机
  3. For relation R where primary key contains multiple attributes,no non-key attribute should be functionally dependent on a part of

For relation R where primary key contains multiple attributes,no non-key attribute should be functionally dependent on a part of

admin2005-05-10  51
问题 For relation R where primary key contains multiple attributes,no non-key attribute should be functionally dependent on a part of the primary key. This relation R is at least in
选项 A、 1NF
B、2NF
C、3NF
D、BCNF
答案B
解析
转载请注明原文地址:https://kaotiyun.com/show/w9NZ777K
0

笔试

原NCRE全国计算机四级

NCRE全国计算机四级

相关试题推荐
随机试题
最新回复(0)