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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