SQL>
SQL> CREATE TABLE Instructor (
2 InstructorID INT NOT NULL PRIMARY KEY,
3 Name VARCHAR(50) NOT NULL);
Table created.
SQL> INSERT INTO Instructor (InstructorID,Name) VALUES (1,'Victor');
1 row created.
SQL> INSERT INTO Instructor (InstructorID,Name) VALUES (2,'Bill');
1 row created.
SQL> INSERT INTO Instructor (InstructorID,Name) VALUES (3,'Mary');
1 row created.
SQL> INSERT INTO Instructor (InstructorID,Name) VALUES (4,'Jack');
1 row created.
SQL> INSERT INTO Instructor (InstructorID,Name) VALUES (5,'Peter');
1 row created.
SQL> INSERT INTO Instructor (InstructorID,Name) VALUES (6,'Tom');
1 row created.
SQL>
SQL>
SQL> CREATE TABLE Course (
2 CourseID INT NOT NULL PRIMARY KEY,
3 Name VARCHAR(50),
4 Credits INT);
Table created.
SQL> INSERT INTO Course (CourseID,Name,Credits) VALUES (1,'SQL',5);
1 row created.
SQL> INSERT INTO Course (CourseID,Name,Credits) VALUES (2,'Java',5);
1 row created.
SQL> INSERT INTO Course (CourseID,Name,Credits) VALUES (3,'XML',5);
1 row created.
SQL> INSERT INTO Course (CourseID,Name,Credits) VALUES (4,'ERP',5);
1 row created.
SQL> INSERT INTO Course (CourseID,Name,Credits) VALUES (5,'Oracle',5);
1 row created.
SQL>
SQL>
SQL>
SQL> CREATE TABLE Room (
2 RoomID INT NOT NULL PRIMARY KEY,
3 Comments VARCHAR(50),
4 Capacity INT);
SQL>
SQL>
SQL>
SQL> CREATE TABLE Class (
2 ClassID INT NOT NULL PRIMARY KEY,
3 CourseID INT NOT NULL,
4 InstructorID INT NOT NULL,
5 RoomID INT NOT NULL,
6 Time VARCHAR(50));
Table created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (1,1,1,6,'Mon 09:00-11:00');
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (2,2,1,5,'Mon 11:00-12:00, Thu 09:00-11:00');
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (3,3,2,3,'Mon 14:00-16:00');
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (4,4,3,2,'Tue 10:00-12:00, Thu 14:00-15:00');
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (5,5,2,9,'Tue 14:00-16:00');
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (6,6,3,2,'Tue 16:00-17:00, Thu 15:00-17:00');
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (7,7,4,3,'Wed 09:00-11:00');
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (8,8,5,8,'Wed 11:00-13:00, Fri 09:00-11:00');
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (9,9,1,5,'Fri 11:00-13:00');
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (10,10,6,9,'Fri 14:00-16:00');
1 row created.
SQL>
SQL>
SQL> CREATE TABLE emp (
2 empID INT NOT NULL PRIMARY KEY,
3 Name VARCHAR(50) NOT NULL);
Table created.
SQL> INSERT INTO emp (empID,Name) VALUES (1,'Tom');
1 row created.
SQL> INSERT INTO emp (empID,Name) VALUES (2,'Jack');
1 row created.
SQL> INSERT INTO emp (empID,Name) VALUES (3,'Mary');
1 row created.
SQL> INSERT INTO emp (empID,Name) VALUES (4,'Bill');
1 row created.
SQL> INSERT INTO emp (empID,Name) VALUES (5,'Cat');
1 row created.
SQL>
SQL> CREATE TABLE Exam (
2 ExamID INT NOT NULL PRIMARY KEY,
3 CourseID INT NOT NULL,
4 InstructorID INT NOT NULL,
5 SustainedOn DATE,
6 Comments VARCHAR(255));
Table created.
SQL> INSERT INTO Exam (ExamID,CourseID,InstructorID,SustainedOn,Comments) VALUES (1,1,1,DATE '2003-03-12','Hard');
1 row created.
SQL> INSERT INTO Exam (ExamID,CourseID,InstructorID,SustainedOn,Comments) VALUES (2,2,1,DATE '2003-03-13','Simple');
1 row created.
SQL> INSERT INTO Exam (ExamID,CourseID,InstructorID,SustainedOn,Comments) VALUES (3,3,2,DATE '2003-03-11','1 hour long');
1 row created.
SQL> INSERT INTO Exam (ExamID,CourseID,InstructorID,SustainedOn) VALUES (4,4,3,DATE '2003-03-18');
1 row created.
SQL> INSERT INTO Exam (ExamID,CourseID,InstructorID,SustainedOn,Comments) VALUES (5,5,2,DATE '2003-03-19','2 hours long');
1 row created.
SQL>
SQL> CREATE TABLE dept (
2 deptID INT NOT NULL PRIMARY KEY,
3 empID INT NOT NULL,
4 ClassID INT NOT NULL,
5 EnrolledOn DATE,
6 Grade INT);
Table created.
SQL>
SQL> INSERT INTO dept (deptID,empID,ClassID,EnrolledOn,Grade) VALUES (1,1,1,DATE '2002-09-23',62);
1 row created.
SQL> INSERT INTO dept (deptID,empID,ClassID,EnrolledOn,Grade) VALUES (2,1,2,DATE '2002-09-30',70);
1 row created.
SQL> INSERT INTO dept (deptID,empID,ClassID,EnrolledOn,Grade) VALUES (3,2,3,DATE '2003-09-23',51);
1 row created.
SQL> INSERT INTO dept (deptID,empID,ClassID,EnrolledOn,Grade) VALUES (4,2,5,DATE '2003-09-23',41);
1 row created.
SQL> INSERT INTO dept (deptID,empID,ClassID,EnrolledOn,Grade) VALUES (5,2,6,DATE '2003-09-23',68);
1 row created.
SQL> INSERT INTO dept (deptID,empID,ClassID,EnrolledOn,Grade) VALUES (6,3,4,DATE '2002-09-30',78);
1 row created.
SQL> INSERT INTO dept (deptID,empID,ClassID,EnrolledOn,Grade) VALUES (7,3,7,DATE '2002-09-30',80);
1 row created.
SQL> INSERT INTO dept (deptID,empID,ClassID,EnrolledOn,Grade) VALUES (8,4,8,DATE '2002-09-20',70);
1 row created.
SQL>
SQL> CREATE TABLE empExam (
2 empID INT NOT NULL,
3 ExamID INT NOT NULL,
4 Mark INT,
5 Taken SMALLINT,
6 Comments VARCHAR(255),
7 CONSTRAINT PK_empExam PRIMARY KEY (empID, ExamID));
Table created.
SQL>
SQL>
SQL> INSERT INTO empExam (empID,ExamID,Mark,Taken,Comments) VALUES (1,1,55,1,'Satisfactory');
1 row created.
SQL> INSERT INTO empExam (empID,ExamID,Mark,Taken,Comments) VALUES (1,2,73,1,'Good result');
1 row created.
SQL> INSERT INTO empExam (empID,ExamID,Mark,Taken,Comments) VALUES (2,3,44,1,'Hard');
1 row created.
SQL> INSERT INTO empExam (empID,ExamID,Mark,Taken,Comments) VALUES (2,5,39,0,'Simple');
1 row created.
SQL> INSERT INTO empExam (empID,ExamID,Mark,Taken) VALUES (2,6,63,1);
1 row created.
SQL>
SQL>
SQL>
SQL> SELECT Name, 'Instructor' As Role FROM Instructor
2 WHERE InstructorID = (
3 SELECT InstructorID FROM Class WHERE ClassID = 1)
4 UNION
5 SELECT Name, 'emp' FROM emp
6 WHERE empID IN (
7 SELECT empID FROM dept WHERE ClassID = 1);
NAME
--------------------------------------------------
ROLE
--------------------------------
Tom
emp
Victor
Instructor
2 rows selected.
SQL>
SQL>
SQL> drop table Instructor;
Table dropped.
SQL> drop table Class;
Table dropped.
SQL> drop table emp;
Table dropped.
SQL> drop table dept;
Table dropped.