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SQL>
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> 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));
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> INSERT INTO emp (empID,Name) VALUES (6,'Victor');
1 row created.
SQL>
SQL> SELECT empExam.ExamID,
2 empExam.Mark,
3 Exam.SustainedOn,
4 emp.Name
5 FROM Exam
6 INNER JOIN (emp
7 INNER JOIN empExam ON emp.empID = empExam.empID)
8 ON Exam.ExamID = empExam.ExamID
9 ORDER BY empExam.ExamID;
EXAMID MARK SUSTAINED
---------- ---------- ---------
NAME
--------------------------------------------------
1 55 12-MAR-03
Tom
2 73 13-MAR-03
Tom
3 44 11-MAR-03
Jack
5 39 19-MAR-03
Jack
4 rows selected.
SQL>
SQL>
SQL> drop table emp;
Table dropped.
SQL> drop table empExam;
Table dropped.
SQL> drop table exam;
Table dropped.
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