mysql 得票最多的

Question

ID POST_ID

1 60
2 457
3 457
4 457
5 25
6 25

我如何获得投票最多的列表，结果是：

457
25
60

Answer 1

  SELECT post_id 
    FROM my_table 
GROUP BY post_id 
ORDER BY COUNT(id) DESC

Answer 2

SELECT post_id, count(post_id) num_votes 
  FROM your_table 
  GROUP BY post_id 
  ORDER BY num_votes DESC

会给你：

+---------+-----------+
| post_id | num_votes |
+---------+-----------+
| 457     | 3         |
| 25      | 2         |
| 60      | 1         |
+---------+-----------+