Mega Code Archive

Uses dynamic SQL to issue an ALTER SESSION statement

SQL> SQL> CREATE TABLE session ( 2 department CHAR(3), 3 course NUMBER(3), 4 description VARCHAR2(2000), 5 max_lecturer NUMBER(3), 6 current_lecturer NUMBER(3), 7 num_credits NUMBER(1), 8 room_id NUMBER(5) 9 ); Table created. SQL> SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id) 2 VALUES ('HIS', 101, 'History 101', 30, 11, 4, 20000); 1 row created. SQL> SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id) 2 VALUES ('HIS', 301, 'History 301', 30, 0, 4, 20004); 1 row created. SQL> SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id) 2 VALUES ('CS', 101, 'Computer Science 101', 50, 0, 4, 20001); 1 row created. SQL> SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id) 2 VALUES ('ECN', 203, 'Economics 203', 15, 0, 3, 20002); 1 row created. SQL> SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id) 2 VALUES ('CS', 102, 'Computer Science 102', 35, 3, 4, 20003); 1 row created. SQL> SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id) 2 VALUES ('MUS', 410, 'Music 410', 5, 4, 3, 20005); 1 row created. SQL> SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id) 2 VALUES ('ECN', 101, 'Economics 101', 50, 0, 4, 20007); 1 row created. SQL> SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id) 2 VALUES ('NUT', 307, 'Nutrition 307', 20, 2, 4, 20008); 1 row created. SQL> SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id) 2 VALUES ('MUS', 100, 'Music 100', 100, 0, 3, NULL); 1 row created. SQL> SQL> SQL> CREATE TABLE place ( 2 room_id NUMBER(5) PRIMARY KEY, 3 building VARCHAR2(15), 4 room_number NUMBER(4), 5 number_seats NUMBER(4), 6 description VARCHAR2(50) 7 ); Table created. SQL> SQL> INSERT INTO place (room_id, building, room_number, number_seats, description) 2 VALUES (20001, 'Building 7', 201, 1000, 'Large Lecture Hall'); 1 row created. SQL> SQL> INSERT INTO place (room_id, building, room_number, number_seats, description) 2 VALUES (20002, 'Building 6', 101, 500, 'Small Lecture Hall'); 1 row created. SQL> SQL> INSERT INTO place (room_id, building, room_number, number_seats, description) 2 VALUES (20003, 'Building 6', 150, 50, 'Discussion Room A'); 1 row created. SQL> SQL> INSERT INTO place (room_id, building, room_number, number_seats, description) 2 VALUES (20004, 'Building 6', 160, 50, 'Discussion Room B'); 1 row created. SQL> SQL> INSERT INTO place (room_id, building, room_number, number_seats,description) 2 VALUES (20005, 'Building 6', 170, 50, 'Discussion Room C'); 1 row created. SQL> SQL> INSERT INTO place (room_id, building, room_number, number_seats, description) 2 VALUES (20006, 'Music Building', 100, 10, 'Music Practice Room'); 1 row created. SQL> SQL> INSERT INTO place (room_id, building, room_number, number_seats, description) 2 VALUES (20007, 'Music Building', 200, 1000, 'Concert Room'); 1 row created. SQL> SQL> INSERT INTO place (room_id, building, room_number, number_seats, description) 2 VALUES (20008, 'Building 7', 300, 75, 'Discussion Room D'); 1 row created. SQL> SQL> INSERT INTO place (room_id, building, room_number, number_seats,description) 2 VALUES (20009, 'Building 7', 310, 50, 'Discussion Room E'); 1 row created. SQL> SQL> CREATE TABLE lecturer ( 2 id NUMBER(5) PRIMARY KEY, 3 first_name VARCHAR2(20), 4 last_name VARCHAR2(20), 5 major VARCHAR2(30), 6 current_credits NUMBER(3) 7 ); Table created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10001, 'Scott', 'Lawson','Computer Science', 11); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major, current_credits) 2 VALUES (10002, 'Mar', 'Wells','History', 4); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10003, 'Jone', 'Bliss','Computer Science', 8); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10004, 'Man', 'Kyte','Economics', 8); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10005, 'Pat', 'Poll','History', 4); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10006, 'Tim', 'Viper','History', 4); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10007, 'Barbara', 'Blues','Economics', 7); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10008, 'David', 'Large','Music', 4); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10009, 'Chris', 'Elegant','Nutrition', 8); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10010, 'Rose', 'Bond','Music', 7); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10011, 'Rita', 'Johnson','Nutrition', 8); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10012, 'Sharon', 'Clear','Computer Science', 3); 1 row created. SQL> SQL> SQL> DECLARE 2 v_RoomRec place%ROWTYPE; 3 myLecturerRec lecturer%ROWTYPE; 4 v_sessionRec session%ROWTYPE; 5 BEGIN 6 SELECT * 7 INTO v_RoomRec 8 FROM place 9 WHERE room_ID = 20001; 10 11 EXECUTE IMMEDIATE 'ALTER SESSION SET SQL_TRACE = TRUE'; 12 13 SELECT * 14 INTO myLecturerRec 15 FROM lecturer 16 WHERE ID = 10007; 17 18 EXECUTE IMMEDIATE 'ALTER SESSION SET SQL_TRACE = FALSE'; 19 20 SELECT * 21 INTO v_sessionRec 22 FROM session 23 WHERE department = 'NUT' and course = 307; 24 END; 25 / PL/SQL procedure successfully completed. SQL> SQL> drop table session; Table dropped. SQL> SQL> drop table place; Table dropped. SQL> drop table lecturer; Table dropped. SQL>