中等ICT-DBAS-010

Referential integrity means:

A. A firewall blocks every email.

B. A bitmap is stored in bytes.

C. A command word asks for a reason.

D. A foreign key must match an existing primary key.✓ 答案

解說

You should not be able to store a loan for a borrower id that is not in the borrower table. That rule is referential integrity.