使用SQL和JOIN进行Tally投票(这可能吗？)

Question

我的问题类似于我已经尝试过解决方案的问题,但这对我的情况来说并不完全正确.

我有2张桌子:投票和帖子.这是一个基本草图:

`posts`
----+------------------------------------------------------------------------+
| ID | post_title                                                            |
+----+-----------------------------------------------------------------------+
|  1 | Hello world.                                                          |
|  2 | This is a post!                                                       |
|  3 | What is the meaning of life?                                          |
|  4 | Looking for a good time?                                              |
+----+-----------------------------------------------------------------------

`votes`
+----+---------+
| ID | post_id | 
+----+---------+
|  1 |     1   |  
|  2 |     1   | 
|  3 |     1   |  
|  4 |     3   | 
|  5 |     3   |  
|  6 |     4   |  
+----+---------+

问题:

我想知道每个帖子得到多少票,并显示它们,以便投票率最高的帖子位于顶部.

     Post ID   Vote Count
   +---------+-----------+
   | 1       | 3         |
   | 3       | 2         |
   | 4       | 1         |
   | 2       | 0         |

SQL查询的目的是什么来实现这一目标？

Answer 1

select post_id, count(*)
from votes
group by post_id
order by count(*) desc

编辑:

select v.post_id, count(*)
from votes v INNER JOIN posts p ON v.post_id = p.id
group by v.post_id
order by count(*) desc