How does the concept of an object in the object-oriented model differ from the concept of an entity in the entity-relationship model?
Answer to relevant QuestionsA car-rental company maintains a vehicle database for all vehicles in its current fleet. For all vehicles, it includes the vehicle identification number, license number, manufacturer,model, date of purchase, and color. ...Using ODMG C++a. Give schema definitions corresponding to the relational schema shown in Figure, using references to express foreign-key relationships.b. Write programs to compute each of the queries in Exercise 3.10.Redesign the database of Exercise 9.1 into first normal form and fourth normal form. List any functional or multivalued dependencies that you assume. Also list all referential-integrity constraints that should be present in ...Rewrite the query in Section 9.6.1 that returns the titles of all books that have more than one author, using the with clause in place of the function.Write a query in XQuery on the XML representation as shown below to compute the left outer join of customer elements with account elements. account-number ID #REQUIREDowners IDREFS #REQUIRED >customer-id ID #REQUIREDaccounts ...
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