Y Ternary relationship types.

+ +

- -

^ ^

(a) The ternary relationship type SUPPLY.

(b) Three binary relationship types that are not equivalent to the ternary relationship type SUPPLY.

(c) SUPPLY represented as a weak entity type.

Web Page Copyright: 國立政治大學資訊科學系 連耀南 lien@cherry.cs.nccu.edu.tw ; fig3-16.htm,  Thu Jul 29 18:27:02 CST 1999