Single Relationships (Cont.) If the relationship depositor is one to one,then the link depositor has two arrows. customer-name customer-street customer-city customer account-number balance account Only one-to-many and one-to-one relationships can be directly represented in the hierarchical mode. Database System Concepts,5th Ed. B.8 ©Silberschat乜，Korth and SudarshanDatabase System Concepts, 5 B.8 ©Silberschatz, Korth and Sudarshan th Ed. Single Relationships (Cont.) If the relationship depositor is one to one, then the link depositor has two arrows. Only one-to-many and one-to-one relationships can be directly represented in the hierarchical mode