mysql - 添加两个表的计数然后分组

Question

我有两个查询（返回正确的结果），我基本上想组合计数然后分组：

Select profileID, 
Count(*) as numTotal from replies
GROUP BY profileID;

结果：

profileID: 1,2,3   
numTotal: 10,1,1

和

Select postedByID,
Count(*) as numTotal from WIRL_01.posts 
Group by postedByID

结果：

postedByID: 1,2,3 
numTotal: 13,4,3

在这种情况下，我想将 profileID = postedByID 分组。我尝试了以下但无济于事：

Select profileID,
Count(*) as numTotal 
from replies
INNER JOIN posts ON replies.profileID = posts.postedByID
Group by profileID

结果：

postedByID: 1,2,3 
numTotal: 130,4,3

任何指导将不胜感激。

编辑：

这个查询让我更接近一点，但是如何按 profileID 对结果进行分组？

Select profileID, Count(*) from WIRL_01.replies Group by profileID
UNION ALL
Select postedByID, Count(*) from WIRL_01.posts Group by postedByID

给我...

profileID：1,2,3,1,2,3 计数（*）：10,1,1,13,4,3

我需要的是：

profileID: 1,2,3 计数(*):23,5,4

Answer 1

知道了！:)

Select profileID, sum(count) as totalNum from (Select profileID, Count(*) as count from  replies Group by profileID
UNION ALL
Select postedByID, Count(*) as count from posts Group by postedByID) as numTotal
group by profileID

非常感谢 Joe Stafanelli：Selecting Sum of the Count From Tables in a DB