CSC 480: Database and File Systems, Spring 2011

SQL Exercises

For each query below, write an SQL select statement. Assume that the following tables have been created (this database is available in the folder I:\21011_CSC480A\public\CompanyDB; the code to create it is here):

1. Select fname, minit, lname and dname of employees and the department each works in.
2. Produce a list of employees, fname, lname, salary, in order of increasing salary.
3. Produce a list of employees, fname, lname, salary, in order of decreasing salary.
4. Retrieve the names of all employees in department 5 who work more than 10 hours on the "ProductX" project.
5. Retrieve the names of all employees who work on the "ProductX" project less than 20 hours.
6. List the names of all employees who have a dependent with the same first name as themselves.
7. Find the names of all employees who are directly supervised by Franklin Wong (You are NOT to use Franklin's SSN in this query).
8. For each project, list the project name and the total hours per week (by all employees) spent on that project.
9. List the names of employees who work on every project.
10. List the names of all employees who do not work on any project.
11. For each department, retrieve the department name and the average salary of all employees working in the department.
12. Find the names and addresses of all employees who work on at least one project located in Houston but whose department has no location in Houston (This is a tricky one).
13. List the names of all department managers who have no dependents.

DePauw University, Computer Science Department, Spring 2011
Maintained by Brian Howard (bhoward@depauw.edu). Last updated