mySQL 投票系统 SELECT

Question

我有一个投票系统，表格如下所示:

answers
-----------
int id
text content

results
-----------
int id
int answers_id

我想要一个选择，这样即使没有投票(结果)，我也可以看到答案和回复数量。 我尝试过这样的事情:

SELECT 
count(results.answers_id), answers.content
from answers
left outer join results
on answers.id = results.answers_id
group by results.answers_id

但它没有得到 0 票(结果)的答案。

Answer 1

这应该可以完成工作:

SELECT count(results.answer_id), answers.content
from answers left outer join results on answers.id = results.answer_id
group by answers.content;