596.Classes 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 belowselect class from courses group by class having count(distinct student)>=5 ;
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Last updated 11 months ago