MySql选择排序查询后的条件，条件>>

Question

数据库：

• 用户-ID，名称
• 消息-发件人，详细信息，收件人

SELECT 
    id, COUNT(sender) AS COUNT, 
    RANK() OVER (ORDER BY COUNT(sender) DESC) count_rank  
FROM 
    `message` 
LEFT JOIN 
    `user` ON id = sender  
GROUP BY 
    sender 
ORDER BY 
    COUNT(sender) DESC;
+----+-------+-----------+
| id | count | count_rank|
+----+-------+-----------+
| 7  | 20    |         1 |
| 4  | 18    |         2 |
| 9  | 18    |         2 |
| 2  |  7    |         4 |
| 5  |  4    |         5 |
+----+-------+-----------+
在此输出上，我只想获取ID 9计数和排名

我尝试

SELECT 
    id, COUNT(sender) AS COUNT, 
    RANK() OVER (ORDER BY COUNT(sender) DESC) count_rank  
FROM 
    `message` 
LEFT JOIN 
    `user` ON id = sender 
WHERE 
    `message`.`sender` = 9
 GROUP BY 
     sender 
 ORDER BY 
     COUNT(sender) DESC;
但是我的排名是错误的

我的结果：Id 9 rank 1

预期：Id 9 rank 2

数据库：用户-ID，名称消息-发送方，详细信息，接收方SELECT ID，COUNT（发送方）作为计数，RANK（）超过（按COUNT（发送方）DESC排序）count_rank FROM`message` LEFT JOIN`...

Answer 1

您需要对当前查询进行子查询，然后限制为所需的id：