下列不属于非平凡函数依赖的是______。 A) (CustomerID,Provi
题型:单项选择题
问题:
下列不属于非平凡函数依赖的是______。
A) (CustomerID,ProviderID,BuyDate)→GoodsName
B) (CustomerID,ProviderID,BuyDate)→GoodsName,ProviderID
C) (CustomerID,ProviderID,BuyDare)→GoodsClassID
D) (CustomerID,ProvideIID,BuyDate)→ProviderID