如何查找計數最高的對象的數量？

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, ..) 

我想算這樣吧，我應該怎麼做，在遞減計數爲了

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 

這裏的SQLfiddle鏈接。