問題詳情
17、 Which of the following belongs to the conceptual data model?
(A)Hierarchical data model
(B) Network data model
(C) Relational data model
(D) Entity relationship modelPRODUCT 主鍵:P_NUMP_NUM(產品代碼)P_NAME(產品名稱)P_PRICE(產品進貨價格)V_NUM(廠商代碼)
參考答案
答案：D
難度：適中0.5
統計：A(1),B(1),C(4),D(7),E(0)