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DBMS Korth Edition 6 Exercise 7 Question 27 (Page No. 321)
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Explain the distinction between condition-defined and user-defined constraints.
Which of these constraints can the system check automatically?
Explain your answer.
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DBMS Korth Edition 6 Exercise 7 Question 29 (Page No. 321)
Explain the distinction between total and partial constraints.
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DBMS Korth Edition 6 Exercise 7 Question 28 (Page No. 321)
Explain the distinction between disjoint and overlapping constraints.
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DBMS Korth Edition 6 Exercise 7 Question 26 (Page No. 321)
Design a generalization-specialization hierarchy for a motor vehicle sales company. The company sells motorcycles, passenger cars, vans, and buses. Justify your placement of attributes at each level of the hierarchy. Explain why they should not be placed at a higher or lower level.
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DBMS Korth Edition 6 Exercise 7 Question 20 (Page No. 319-320)
Consider the E-R diagram in Figure given below, which models an online bookstore. a. List the entity sets and their primary keys. b. Suppose the bookstore adds Blu-ray discs and downloadable videos to its collection. ... model the case where a shopping basket may contain any combination of books, Blu-ray discs, or downloadable video.
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