Each row in the relational table is known as an entity instance or entity occurrence in the ER model.
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Q5: Even when a good database blueprint is
Q6: The external model is the representation of
Q7: In the context of data models, an
Q8: In Chen notation, entities and relationships have
Q9: A disadvantage of the relational database management
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.
Q14: Database designers determine the data and information
Q15: Business rules must be rendered in writing.
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