List four different types of database models and DBMSs. Which are in common uses today?
Answer to relevant QuestionsWith respect to relational databases, briefly define the terms row and field.How is a one-to-many relationship on an ERD represented in a relational database?What is an object identifier? Why are object identifiers required in an object database?What are the advantages of having an RDBMS provide complex data types?Revisit the issues raised in the Nationwide Books (NB) case at the beginning of the chapter. Should NB adopt an ODBMS for the new Web-based ordering system? Why or why not?
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