( 5 )下列不属于非平凡函数依赖的是A ) ( CustomerID,ProviderID,BuyDate ) → GoodsNameB) (Cust
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( 5 )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,BuyDate ) → GoodsClassID
D ) ( CustomerID,ProviderID,BuyDate ) → ProviderID
参考答案: