This document contains SQL commands to create tables for a university database including tables for students, faculty, courses, sections, qualifications, and registrations. It also includes commands to insert, update, delete data from the tables as well as queries to select data from single and joined tables with conditions.

1. 1
Ch 6: Problems and Exercises 1
CREATE TABLE STUDENT
(StudentID NUMBER NOT NULL ,
StudentName VARCHAR2(25),
CONSTRAINT STUDENT_PK PRIMARY KEY (StudentID));
CREATE TABLE FACULTY
(FacultyID NUMBER NOT NULL,
FacultyName VARCHAR2(25),
CONSTRAINT FACULTY_PK PRIMARY KEY (FacultyID));
CREATE TABLE COURSE
(CourseID CHAR(8) NOT NULL,
CourseName VARCHAR2(15),
CONSTRAINT COURSE_PK PRIMARY KEY (CourseID));

2. 2
Ch 6: Problems and Exercises 1 (cont.)
CREATE TABLE SECTION
(SectionNo NUMBER NOT NULL,
CourseID CHAR(8),
CONSTRAINT SECTION_PK PRIMARY KEY (SectionNo),
CONSTRAINT SECTION_FK FOREIGN KEY (CourseID)
REFERENCES COURSE (CourseID));
CREATE TABLE QUALIFIED
(FacultyID NUMBER NOT NULL ,
CourseID CHAR(8) NOT NULL,
DateQualified DATE,
CONSTRAINT QUALIFIED_PK PRIMARY KEY (FacultyID, CourseID)
CONSTRAINT QUALIFIED_FK1 FOREIGN KEY (FacultyID)
REFERENCES FACULTY (FacultyID)
CONSTRAINT QUALIFIED_FK2 FOREIGN KEY (CourseID)
REFERENCES COURSE (CourseID));

3. 3
Ch 6: Problems and Exercises 1 (cont.)
CREATE TABLE REGISTRATION
(StudentID NUMBER NOT NULL,
SectionNo NUMBER NOT NULL,
Semester CHAR(7),
CONSTRAINT REGISTRATION_PK PRIMARY KEY (StudentID,
SectionNo),
CONSTRAINT REGISTRATION_FK1 FOREIGN KEY (StudentID)
REFERENCES STUDENT (StudentID),
CONSTRAINT REGISTRATION_FK2 FOREIGN KEY (SectionNo)
REFERENCES SECTION (SectionNo));

4. 4
Ch 6: Problems and Exercises 2
CREATE VIEW Student_V AS
SELECT * FROM STUDENT;

5. 5
Ch 6: Problems and Exercises 3
(a) Referential integrity may be enforced when the SECTION table is created:
CREATE TABLE SECTION
(SectionNo NUMBER NOT NULL,
CourseID CHAR(8),
CONSTRAINT SECTION_PK PRIMARY KEY (SectionNo)
CONSTRAINT SECTION_FK FOREIGN KEY (CourseID)
REFERENCES COURSE (CourseID));
(b) Or, referential integrity may be enforced using the ALTER TABLE command:
ALTER TABLE SECTION
ADD CONSTRAINT SECTION_FK FOREIGN KEY (CourseID)
REFERENCES COURSE(CourseID);

6. 6
Ch 6: Problems and Exercises 4
(a) ALTER TABLE STUDENT
ADD (Class VARCHAR2(6));
(b) DROP TABLE REGISTRATION;
(c) ALTER TABLE FACULTY
MODIFY (FacultyName VARCHAR2(40));

7. 7
Ch 6: Problems and Exercises 5
(a) INSERT INTO STUDENT (StudentID, StudentName) VALUES
(65798, ‘Lopez’);
Alternatively:
INSERT INTO STUDENT VALUES (65798, ‘Lopez’);
(b) DELETE FROM STUDENT
WHERE StudentID = 65798;
(c) UPDATE COURSE
SET CourseName=‘Introduction to Relational Databases’
WHERE CourseID=‘ISM 4212’;

8. 8
Ch 6: Problems and Exercises 6
(a) SELECT StudentID, StudentName
FROM STUDENT
WHERE StudentID < 50000;
(b) SELECT FacultyName
FROM FACULTY
WHERE FacultyID = 4756;
(c) SELECT MIN(SectionNo)
FROM REGISTRATION
WHERE Semester= ‘I-2008’;

9. 9
Ch 6: Problems and Exercises 7
(a) SELECT COUNT (*)
FROM REGISTRATION
WHERE SectionID=2714 AND Semester=‘I-2008’;
(b) SELECT FacultyID, CourseID, DateQualified
FROM QUALIFIED
WHERE DateQualified >= ‘01-JAN-1993’;

10. 10
Ch 6: Problems and Exercises 8
(a) SELECT StudentID, COUNT (*)
FROM REGISTRATION
WHERE SectionNo IN (2714, 2715)
GROUP BY StudentID
HAVING COUNT(*) = 2;
(b) SELECT FacultyID, COUNT (*)
FROM QUALIFIED
WHERE CourseID IN (‘ISM 3113’, ‘ISM 3112’)
GROUP BY FacultyID
HAVING COUNT(*) = 1;
Note: COUNT(*)>1 also ok.

11. 11
Ch 6: Problems and Exercises 9
(a) SELECT DISTINCT CourseID
FROM SECTION;
(b) SELECT StudentName
FROM STUDENT
ORDER BY StudentName;
(c) SELECT SectionNo, StudentID
FROM REGISTRATION
ORDER BY SectionNo, StudentID;
(d) SELECT CourseID, CourseName
FROM COURSE
ORDER BY CourseID ;