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Exercise 3 SQL

Exercise 3 SQL. 6 Relations of Company. Exercises. (a) Retrieve the names of employees in department 5 who work more than 10 hours per week on the 'ProductX' project. (b) List the names of employees who have a dependent with the same first name as themselves.

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Exercise 3 SQL

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  1. Exercise 3SQL Database System-dww

  2. 6 Relations of Company Database System-dww

  3. Exercises • (a) Retrieve the names of employees in department 5 who work more than 10 hours per week on the 'ProductX' project. • (b) List the names of employees who have a dependent with the same first name as themselves. • (c) Find the names of employees that are directly supervised by 'Franklin Wong'. • (d) For each project, list the project name and the total hours per week (by all employees) spent on that project • (e) Retrieve the names of employees who work on every project. Database System-dww

  4. Exercises • (f) Retrieve the names of employees who do not work on any project. • (g) For each department, retrieve the department name, and the average salary of employees working in that department. • (h) Retrieve the average salary of all female employees. • (i) Find the names and addresses of employees who work on at least one project located in Houston but whose department has no location in Houston. • (j)List the last names of department managers who have no dependents. Database System-dww

  5. select FNAME, LNAME from EMPLOYEE, WORKS_ON, PROJECT where DNO=5 and SSN=ESSN and PNO=PNUMBER and HOURS > 10 and PNAME=ProductX select FNAME, LNAME from EMPLOYEE where DNO=5 and SSN in ( select ESSN from WORKS_ON where HOURS > 10 and PNO in( select PNUMBER from PROJECT where PNAME = ProductX)) Retrieve the names of employees in department 5 who work more than 10 hours per week on the 'ProductX' project Database System-dww

  6. select FNAME, LNAME from EMPLOYEE, DEPENDENT where SSN=ESSN and FNAME=DEPENDENT_NAME select FNAME, LNAME from EMPLOYEE where exist ( select * from DEPENDENT where ESSN=SSN and FNAME and DEPENDENT_NAME=FNAME) List the names of employees who have a dependent with the same first name as themselves. Database System-dww

  7. select FNAME, LNAME from E.EMPLOYEE, S.EMPLOYEE where S.SSN = E.SUPERSSN and S.FNAME=Franklin and S.LNAME=Wong select FNAME, LNAME from EMPLOYEE where SUPERSSN in ( select SSN from EMPLOYEE where FNAME=Franklin and LNAME=Wong) Find the names of employees that are directly supervised by 'Franklin Wong'. Database System-dww

  8. select PNAME, SUM (HOURS) from PROJECT, WORKS_ON where PNUMBER=PNO group by PNAME For each project, list the project name and the total hours per week (by all employees) spent on that project Database System-dww

  9. select FNAME, LNAME from EMPLOYEE where not exist ( select PNUMBER from PROJECT where not exist ( select * from WORKS_ON where PNO=PNUMBER and ESSN=SSN)) Retrieve the names of employees who work on every project Database System-dww

  10. select FNAME, LNAME from EMPLOYEE where not exist ( select * from WORKS_ON where ESSN=SSN) Retrieve the names of employees who do not work on any project Database System-dww

  11. select DNAME, AVG (SALARY) from DEPARTMENT, EMPLOYEE where DNUMBER=DNO group by DNAME For each department, retrieve the department name, and the average salary of employees working in that department. Database System-dww

  12. select AVG (SALARY) from EMPLOYEE where SEX='F' Retrieve the average salary of all female employees Database System-dww

  13. select FNAME, LNAME, ADDRESS from EMPLOYEE where exist ( select * from WORKS_ON, PROJECT where PLOCATION = Houston and PNO=PNUMBER and ESSN=SSN and not exist ( select * from DEP_LOCATIONS where DNO=DNUMBER and DLOCATION= Houston)) Find the names and addresses of employees who work on at least one project located in Houston but whose department has no location in Houston Database System-dww

  14. select LNAME from EMPLOYEE where exist ( select * from DEPARTMENT where SSN=MGRSSN and not exist ( select * from DEPENDENT where SSN=ESSN )) List the last names of department managers who have no dependents Database System-dww

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