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(a) What is a view?
(b) What is the implication of creating a view with the select * statement in the view definition?
(c) Make reference to the relational schema given in Appendix I to answer this question. Create a VIEW called SALARY_VU based on the employee last names, first names, department names and salaries for those employees whose monthly salary is greater than 10000. Label the column Employee Last Name, Employee First Name, Department and Salary respectively. Make sure to encrypt the view.
(d) Explain the purpose of an Outer Join.
(e) In the HR schema given in the Appendix II, there are certain employees who are not assigned to any department and there is a few departments where no employee has been assigned yet.
(i) Write SQL code to display the employee Last name, the department_id and the department name for all employees. Your answer should display even those employees who have not been assigned to any departments.
(ii) Write SQL code to display the employee Last name, the department_id and the department name for all employees. Your answer should display even those departments which have no employee assigned to the departments.
Problem: (a) What do you understand by user-centred design and why is it important? (b) Explain how Prototyping and the Participatory Design approach are useful to the d
What is software maintenance? Changes to the software are made in response to altered requirements but the fundamental structure of the software remains stable.
What is coupling? Coupling is the measure of interconnection between modules in a program structure. It depends on the interface complexity among modules.
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