归一化：从 3NF 转换为 BCNF、4NF 和 5NF答案

【问题标题】：Normalization: Converting from 3NF to BCNF,4NF & 5NF归一化：从 3NF 转换为 BCNF、4NF 和 5NF
【发布时间】：2013-11-03 03:44:35
【问题描述】：

如何将 3NF 过程转换为 5NF 以用于以下模式？

Member (memcode,name,title,address,sex,dob,occupation).
Occupation_Category (occupation,category).
Region (address,region).
Member_Response (memcode,subject,num-sent,num-replied).
Offer_Details (offercode,title,subject).
Offer (offercode,date,price,num-sold ).
Offer_Target (offercode,date,target-category,age-group,target-region).
Supplier (suppcode,name,address,phoneno).
Item (itemcode,description).
Item_in_Offer (offercode,itemcode,qty).
Item_Supplier (offercode,itemcode,suppcode).

【问题讨论】：

you 建议进行哪些更改以进行此转换，为什么？请注意，这些形式（依次为 3NF、BCNF、4NF、5NF）都比前一种形式更具限制性。如果您不确定每种表格的具体要求是什么，维基百科会很好地解释它们。

标签： database-design database-schema

【解决方案1】：

Member (memcode,name,title,address,sex,dob,occupation).
Occupation_Category (occupation,category).
Region (address,region).
Member_Response (memcode,subject,num-sent,num-replied).
Offer_Details (offercode,title,subject).
Offer (offercode,date,price,num-sold ).
Offer_Target (offercode,date,target-category,age-group,target-region).
Supplier (suppcode,name,address,phoneno).
Item (itemcode,description).
Item_in_Offer (offercode,itemcode,qty).
Item_Supplier (offercode,itemcode,suppcode).

【讨论】：