Explain the purpose of an outer join, Software Engineering

Assignment Help:

(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.


Related Discussions:- Explain the purpose of an outer join

What is stepwise refinement, What is stepwise refinement? Stepwise Ref...

What is stepwise refinement? Stepwise Refinement:- Stepwise Refinement is a top-down design method originally proposed by Niklaus Wirth. A program is developed by successively

SRS, What are the advantage and disadvantage of SRS?

What are the advantage and disadvantage of SRS?

Compare and contrast reliability and availability, Q. Compare and contrast ...

Q. Compare and contrast reliability and availability? Ans. Reliability: The probability of failure-free system operation over a specified time in a given environment for a gi

Write short notes on decision table, Q. Write short notes on Decision Table...

Q. Write short notes on Decision Table? Decision Table: While the process logic for a process involves multiple conditions as well as is very complicated it isn't advisable t

State some guidelines for testing, State some guidelines for testing Th...

State some guidelines for testing The below are some guidelines for testing: i)  Test modules thoroughly, cover all the access paths and produce enough data to cover all the

Explain the different architectures developed during bpe, What are the diff...

What are the different architectures developed during BPE? Data architecture àframework for the information needs of a business. Application architecture à incorporates the

Project requirements, Leader: Aim/vision of project. Business plan, Screenc...

Leader: Aim/vision of project. Business plan, Screencast coordination, lines of communication, feedback, must give updates during  lecture slot. Evaluated, in part, on how well who

Constructor, what is constructor overloading

what is constructor overloading

Determine the concept of concurrency, Determine the concept of Concurrency ...

Determine the concept of Concurrency The basic concept in computer programming is concept of handling more than one task at a time. Many programming problems need that the pro

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd