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computer science
database design using entity relationship diagrams
Questions and Answers of
Database Design Using Entity Relationship Diagrams
Why is reverse engineering important?
Come up with an ER diagram for the following relational database:
Come up with an ER diagram for the following relational database:
Come up with an ER diagram for the following relational database:
Come up with an EER diagram for the following database:
What do mandatory attributes (in the Barker/Oracle-like model) translate into in the Chen-like model? Discuss with examples.
What do optional attributes (in the Barker/Oracle-like model) translate into in the Chen-like model? Discuss with examples.
How are the primary keys shown diagrammatically in the Barker/ Oracle-like model?
How is the optional relationship shown diagrammatically in the Barker/Oracle-like model?
How is the many relationship shown diagrammatically in the Barker/Oracle-like model?
Show the following using the Barker/Oracle-like notation:a. A movie theater must show many movies, and movies must be shown in a movie theater.b. A movie theater may show many movies, and movies may
How are recursive relationships shown in the Barker/Oracle-like model?
Why is it difficult to show M:N relationships in the Barker/ Oracle-like model?
How are the foreign keys treated in the Barker/Oracle-like model?
Does the Barker-like model or the Oracle-like model have the concept of the weak entity? Discuss.
Show the following using the Barker/Oracle-like notation: For a student, we are trying to store the student’s name, address, phone, books (that is, books the student borrows from the library). Map
Does the Barker/Oracle-like notation have the concept of the multivalued attribute? Discuss.
Redraw Figure 8.17a using the Barker/Oracle notation. Map this to a relational database and show some sample data.
Redraw Figure 8.7 using the Barker/Oracle notation. Map this to a relational database and show some sample data.
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