In Chen notation, entities and relationships have to be oriented horizontally; not vertically.
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Q3: An implementation-ready data model needn't necessarily contain
Q4: Today, most relational database products can be
Q5: Even when a good database blueprint is
Q6: The external model is the representation of
Q7: In the context of data models, an
Q9: A disadvantage of the relational database management
Q10: Each row in the relational table is
Q11: In an SQL-based relational database, each table
Q12: A data model is usually graphical.
Q13: The relational model is hardware-dependent and software-independent.
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