E-R diagram can express the overall logical structure of a database graphically. E-R diagrams are simple and clear�qualities that may well account in large part for the widespread use of the E-R model. Such a diagram consists of the following major components :-
� Rectangles, which represent entity sets � Ellipses, which represent attributes � Diamonds, which represent relationship sets
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Entity-Relationship Diagram database management system - PDF
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Posted 20 June 2016 - 04:01 AM
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