1. Database Quizz I
Write down your answers in word document with file name
highlighting your name, student number, and class.
E.g “95002”+”_”+ “03 class”+”_”+”name”,
like, “95002_03_Mike.doc”

2. Number 1（20%）
Use one SQL statement to get the list of all the student names, whose every registered course has a score higher than 85.
name　 course　 score
Mike 　DataBase　　 81
Jane　 DataBase　　 86
Jane　　Math　　　 90
Tonny　DataBase 　　86
Tonny　 Math　　
A. select distinct name
from SC　
where　name not in
(select distinct name
from SC
where score<=85)

3. Number 2 （20%）
Assume the student table has the following rows.
Serial Number Sno Sname Cno Cname Score
1　　　　 　Mike　0001　　　Math　　99
2　　　　 　John　0001　　　Math　　89
3　　　　 　Mike 　　　Math　　99
Use one SQL statement to delete the records whose attributes are redundant except for Serial number.
A. delete from tablename
where seriel Number not in
(select min(serial Number)
from tablename
group by Sno, Sname, Cname, Score)

4. Number 3（30%）
Assume a database has the following tables.
Teacher(Tno, Tname) describes the information concerning teachers
Student(Sno,Sname,Sage,Ssex) stores the information about students
Course(Cno,Cname,Tno) is the course table
SC(Sno,Cno,score) has the scores
1. Use one SQL statement to get the list of student names, who at least registers one common course with student with Sno “95005”
A. select distinct SC.Sno,Sname
from Student,SC
where Student.Sno=SC.Sno and Cno in
(select Cno
from SC
where Sno=‘95005')
2. Use one SQL statement to get the complete list of students, who registers only one course. Print their student numbers and names and order the list by student number.
A. select SC.Sno,Student.Sname,count(Cno)
from SC ,Student
where SC.Sno=Student.Sno
group by SC.Sno ,Student.Sname
having count(Cno)=1

5. 3. Use one SQL statement to get the list of courses, each of which is registered by every student.
A. select　Cno, Cname　
from　Course　
where　Cno　in　
(select　Cno
from　SC
group　by　Cno
having count(*) =
(select count(*)
from student))