Question

我有这3张桌子，

tbl_1-
ip  |isp    |infection
----------------------
1   |aaaa   |malware
2   |bbbb   |malware
3   |cccc   |ddos
3   |cccc   |trojan
4   |dddd   |ddos

tbl_2-
ip  |isp    |infection
----------------------
1   |aaaa   |malware
3   |cccc   |ddos
4   |dddd   |trojan
5   |eeee   |trojan
6   |ffff   |other

tbl_3-
ip  |isp    |infection
----------------------
1   |aaaa   |ddos
6   |ffff   |
2   |bbbb   |other

我需要得到如下结果，

result-
ip  |isp    |infection  |ipCount    |ispCount   |infectionCount
--------------------------------------------------------------
1   |aaaa   |malware    |3          |3          |2
1   |aaaa   |ddos       |3          |3          |1
2   |bbbb   |other      |2          |2          |1
2   |bbbb   |malware    |2          |2          |1
3   |cccc   |ddos       |3          |3          |2
3   |cccc   |trojan     |3          |3          |1
4   |dddd   |ddos       |2          |2          |1
4   |dddd   |trojan     |2          |2          |1
5   |eeee   |trojan     |1          |1          |1
6   |ffff   |other      |2          |2          |1
6   |ffff   |           |2          |2          |1

ipCount, ispCount -> count of matching ip and isp
    eg-there are 3 records with ip = 1 and isp = aaaa

infectionCount -> count of matching infections per ip and isp
    eg-there are 2 infections that says malware where ip = 1 and isp = aaaa

我想我需要一个嵌套的查询，但我不知道如何计算两个条件;你能帮忙吗？

编辑：我尝试过的代码，

SELECT ip, isp, infection, count(ip), count(isp), count(infection)
FROM (

SELECT ip, isp, infection
FROM tbl_1
UNION ALL
SELECT ip, isp, infectionType
FROM tbl_2
UNION ALL
SELECT ip, isp, infection
FROM tbl_3
)x

GROUP BY ip, isp, infection

但它没有给出我想要的结果因为我不知道如何在一个查询中做两种类型的计数

Answer 1

您需要对列infection和（ip＆amp; ipc）进行不同的分组，然后使用以下子查询加入它们：

SELECT t1.ip, t1.isp, t2.infection, t1.ipc, t1. ispc, t2.incount
FROM
    (SELECT ip, isp, infection, COUNT(ip) as ipc, COUNT(isp) as ispc
    FROM (
       SELECT ip, isp, infection
       FROM tbl1
       UNION ALL
       SELECT ip, isp, infection
       FROM tbl2
       UNION ALL
       SELECT ip, isp, infection
       FROM tbl3
       )x
     GROUP BY ip, isp) t1
JOIN
    (SELECT ip, isp, infection, COUNT(infection) as incount
     FROM (
       SELECT ip, isp, infection
       FROM tbl1
       UNION ALL
       SELECT ip, isp, infection
       FROM tbl2
       UNION ALL
       SELECT ip, isp, infection
       FROM tbl3
       )x
    GROUP BY ip, isp,  infection)t2
ON t1.ip = t2.ip
ORDER BY ip, isp, infection Desc

See this SQLFiddle

注意：我认为您想要的输出是错误的，因为：

在Table3中infection没有ip=6，但它在您的输出中
infection other（而不是malware）

嵌套查询以获得两个条件的计数

1 个答案:

See this SQLFiddle