Values of attribute Customer_ID in table BORROW(Customer_ID, Loan_no) must be the values o

Values of attribute Customer_ID in table BORROW(Customer_ID, Loan_no) must be the values of Customer_ID that have already existed in table CUSTOMER(Customer_ID, Customer_Name, Address), this constraint is called : A、Entity integrity B、Referential integrity C、Check constraint D、User defined constraint

时间:2024-04-12 16:06:59

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