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# 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 ;
```

> 执行用时 :299 ms, 在所有 C++ 提交中击败了88.32%的用户\
> 内存消耗 : N/A