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
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