( 5 )下列不屬于非平凡函數(shù)依賴的是A ) ( CustomerID,ProviderID,BuyDate ) → GoodsNameB) (Cust
( 5 )下列不屬于非平凡函數(shù)依賴的是
A ) ( CustomerID,ProviderID,BuyDate ) → GoodsName
B) (CustomerID,ProviderID,BuyDate) → GoodsName,ProviderID
C ) ( CustomerID,ProviderID,BuyDate ) → GoodsClassID
D ) ( CustomerID,ProviderID,BuyDate ) → ProviderID
正確答案:D
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