The association between Purchase Orders and Cash Disbursements could be implemented with a foreign key in either table but not both.

Question

Quizplus · Accepted Answer

This is because a Purchase Order would have a one-to-many relationship with Cash Disbursements (each Purchase Order may have multiple Cash Disbursements associated with it), therefore the Purchase Order table would have a foreign key referencing the primary key of the Cash Disbursements table. However, putting a foreign key in the Cash Disbursements table referencing the Purchase Orders table would not make sense as one Cash Disbursement could be associated with multiple Purchase Orders.

The Association Between Purchase Orders and Cash Disbursements Could Be