基于Mysql中的两列计数

Question

我在Mysql中的表是这样的：

 IP       ID     area
 aaa      A        I
 aaa      A        I
 aaa      B        I  
 aaa      C        II
 bbb      A        I
 bbb      B        III
 ccc      B        I

现在我想计算每个区域的值，有多少不同的（IP，ID）对？

如何使用IP和ID作为整个数据集来执行此操作？

我不认为以下查询是正确的：

SELECT area, count (distinct IP, ID) from video GROUP BY area ORDER BY COUNT (distinct ip, ID)

所以有人知道怎么做吗？

Answer 1

SELECT count(*), CONCAT_WS(' ',IP,ID) as yourTitle FROM video GROUP BY yourTitle

应该

Answer 2

SELECT area, count(*) as distinctCount FROM 
  (SELECT DISTINCT IP, ID, area FROM video) distinctVideos 
GROUP BY area
ORDER BY count(*)