mysql - カウントが最も高いオブジェクトの数を見つける方法は?

Question

create table foos (id, val1, ...)

create table bars (id, foo_id, val2. ...)

---

insert into foos (1, 1, ..)

insert into foos (2, 2, ..)

insert into foos (3, 3, ..)

---

insert into bars (1, 1, 1, ..)

insert into bars (2, 1, 1, ..)

insert into bars (3, 1, 1, ..)

insert into bars (4, 2, 1, ..)

insert into bars (5, 2, 1, ..)

insert into bars (6, 2, 1, ..)

insert into bars (7, 2, 1, ..)

insert into bars (8, 3, 1, ..)

このようにバーをカウントしたいのですが、降順でカウントするにはどうすればよいですか

2, 4 (foo 2 has 4 bars)

1, 3 (foo 1 has 3 bars)

3, 1 (foo 3 has a bar)

Answer 1

SELECT `foo_id`, COUNT(1) AS `count`
FROM `bars`
GROUP BY `foo_id`
ORDER BY `count` DESC

これがSQLfiddleリンクです。