Table: Student
+---------------------+---------+ | Column Name | Type | +---------------------+---------+ | student_id | int | | student_name | varchar | +---------------------+---------+ student_id is the primary key for this table. student_name is the name of the student.
Table: Exam
+---------------+---------+ | Column Name | Type | +---------------+---------+ | exam_id | int | | student_id | int | | score | int | +---------------+---------+ (exam_id, student_id) is the primary key for this table. Student with student_id got score points in exam with id exam_id.
A "quite" student is the one who took at least one exam and didn't score neither the high score nor the low score.
Write an SQL query to report the students (student_id, student_name) being "quiet" in ALL exams.
Don't return the student who has never taken any exam. Return the result table ordered by student_id.
The query result format is in the following example.
Student table: +-------------+---------------+ | student_id | student_name | +-------------+---------------+ | 1 | Daniel | | 2 | Jade | | 3 | Stella | | 4 | Jonathan | | 5 | Will | +-------------+---------------+ Exam table: +------------+--------------+-----------+ | exam_id | student_id | score | +------------+--------------+-----------+ | 10 | 1 | 70 | | 10 | 2 | 80 | | 10 | 3 | 90 | | 20 | 1 | 80 | | 30 | 1 | 70 | | 30 | 3 | 80 | | 30 | 4 | 90 | | 40 | 1 | 60 | | 40 | 2 | 70 | | 40 | 4 | 80 | +------------+--------------+-----------+ Result table: +-------------+---------------+ | student_id | student_name | +-------------+---------------+ | 2 | Jade | +-------------+---------------+ For exam 1: Student 1 and 3 hold the lowest and high score respectively. For exam 2: Student 1 hold both highest and lowest score. For exam 3 and 4: Studnet 1 and 4 hold the lowest and high score respectively. Student 2 and 5 have never got the highest or lowest in any of the exam. Since student 5 is not taking any exam, he is excluded from the result. So, we only return the information of Student 2.