Leetcode Index

596.Classes More Than 5 Students

596.Classed More Than 5 Students

难度:Easy

SQL架构 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)>=5 ;

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