Figure 5.4 Self-loops on nodes in a Bachman diagram. other aspects of an ER diagram (also illustrated by Figures 5.2 and 5.3) which can be represented. Since a 1 : 1 relationship is a special case of a 1 : n relationship, this type of relationship anbsp;...
Title | : | Data Models, Database Languages and Database Management Systems |
Author | : | Gottfried Vossen |
Publisher | : | Addison Wesley Publishing Company - 1991 |
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