There is a table courses with columns: student and class
Please list out all classes which have more than or equal to 5 students.
For example, the table:
+---------+------------+ | student | class | +---------+------------+ | A | Math | | B | English | | C | Math | | D | Biology | | E | Math | | F | Computer | | G | Math | | H | Math | | I | Math | +---------+------------+ Should output:
+---------+ | class | +---------+ | Math | +---------+
Note: The students should not be counted duplicate in each course.
# Write your MySQL query statement below
select class from courses group by class having count(distinct student)>4;
