Summer Examinations 2015

Transcription

1 Summer Examinations 2015 CSY203815N Module Title Level Time Allowed Database Application Five Two hours Instructions to students: Enter your student number not your name on all answer books. Answer all questions. Begin each section in a separate answer book; label each answer book clearly with the number of the question you are answering. No. of Pages 7 No. of Questions 12 Page 1 of 7

2 Section A Answer all questions. Study the following Entity Relationship Diagram: LOCATION STUDIO MOVIE CAST PEOPLE The following tables have been used to create an Oracle database: PEOPLE person_id firstname surname street city state 1001 JEFF PRICE 100 OAK STREET CARY NC 1002 CHUCK PETERSON 150 SADDLEBURR TRAIL CARY NC 1003 BRANDON BROOKS 1216 IRONWOOD CIRCLE BUFFALO NY 1004 BRIAN SMITH 1515 MAIN DALLAS TX 1005 PAUL MONK 4421 JEFFERSON HOUSTON TX 1006 REECE RANDALL 838 INNSBRUCK BELLAIRE TX 1007 PETER JONG 1131 SOUTH MAIN KNOXVILLE TN 1008 MAGGIE DAVIS 2150 CANAL NEW ORLEANS LA 1009 BECKY ORVIS 7831 TUPELO MADISON WI 1010 CAROL DELANO 8310 NIGHTINGALE HOUSTON TX 1011 FRAN FRIEND 152 E MAIN CARY NC STUDIOS studio_id studio_name studio_city studio_state 2001 GIANT LOS ANGELES CA 2002 MPM BURBANK CA 2003 DELIGHTED ARTISTS AUSTIN TX 2004 FKG APEX NC 2005 METAVERSAL STUDIOS LOS ANGELES CA Page 2 of 7

3 NOTE: director_id in movies contains data listed in person_id MOVIES movie_id movie_title studio_id budget$m gross$m release_date director_id 3001 MINERAL HOUSE JAN PRINCE KONG MAY THE CODE 3003 WARRIOR SEP BILL DURHAM JUL CODEPENDENCE 3005 DAY JUL THE LINUX FILES AUG SQL STRIKES BACK NOV THE PROGRAMMER APR HARD CODE APR THE REAR 3010 WINDOWS JUL LOCATIONS location_id movie_id city state LOS ANGELES CA PORTLAND ME PORTLAND ME HOUSTON TX PHILADELPHIA PA CAST person_id movie_id role payment$ THOMAS BLACK ROBERT MAXWELL MALCOLM RICHARDS NINA SMITH PAM GREEN GEORGE BLAKE MITCH CRANE CHRIS PARKER PAUL NERO SHEILA SLADE MANFRED POWELL Page 3 of 7

4 Question 1 Using a UNION set operator, write the SQL to provide a list of cities where there are people living and where studios are located. Question 2 Explain the purpose of the following query: SELECT studio_city FROM studio MINUS SELECT city FROM people; Question 3 Show the expected output of the previous query. Question 4 Write the SQL querying the database to provide a list of movies produced by MPM. (6 marks) Question 5 Show the expected output of the previous query. Question 6 Explain the purpose of the following query (TX = Texas): SELECT movie_id, movie_title, budget$m, gross$m FROM movies WHERE director_id IN ( SELECT person_id FROM people WHERE state = 'TX'); (5 marks) Page 4 of 7

5 Question 7 a. Show the expected output of the previous query. (3 marks) b. What would be the impact on the result set if the last line in the above statement was changed as below, briefly explain your answer? WHERE state = 'tx' (3 marks) Question 8 Write the SQL querying the database to provide a list of the total gross income of each studio by studio s name, showing the highest first. (8 marks) Question 9 Show the expected output of the previous query. Question 10 Explain the purpose of the following query: SELECT ROUND(AVG(gross$m - budget$m),2) NET$m FROM movies; (5 marks) Total: 50 marks End of Section A Section B follows overleaf Page 5 of 7

6 Section B Answer both questions. Question 11 a. Explain the components and purpose of the procedure outlined below. Include in your explanation the datatype(s) used for the parameters. (20 marks) SET SERVEROUTPUT ON CREATE OR REPLACE PROCEDURE proc_update_pay( in_person_id IN people.person_id%type, in_payment IN cast.payment$%type, in_movie_id IN movies.movie_id%type) IS BEGIN UPDATE cast c SET payment$ = in_payment WHERE c.person_id = in_person_id AND c.movie_id = in_movie_id; DBMS_OUTPUT.PUT_LINE(in_person_id '''s pay has been increased for ' in_movie_id ' to $' in_payment); EXCEPTION WHEN OTHERS THEN raise_application_error(-20001,'error'); END proc_update_pay; / b. Write the code that would execute the procedure above, include example arguments. (3 marks) c. Show the expected output based on your example in (b). (2 marks) Total: 25 marks Page 6 of 7

7 Question 12 a. Using examples of server side triggers, explain their key components. Include in your discussion the different firing events. (15 marks) b. Discuss areas where server side triggers might be used and to what effect. (10 marks) Total: 25 marks End of Section B End of Paper Page 7 of 7