选择每个班级的学生总数

Question

我有两张桌子：

类：cid，名称，位置

学生：sid，姓名，性别，classID

我正在尝试使用select语句来显示班级名称以及班级中的学生总数。我也试图排除桌上少于10名学生的班级。

Answer 1

  SELECT
    c.name as className,
    count(s.sid) as totalStudents
  FROM Class c
    JOIN Student s ON s.classID = c.cid
  GROUP BY c.id
  HAVING count(s.sid) >= 10

Answer 2

select a.name, count(*)  
from Class as a
inner join Student as b on b.ClassID = a.cid
group by a.name
having count(*) >= 10;