匹配列

Question

我想知道是否有顯示一組匹配或不同數據的方式..喜歡，說我有三個表，

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 

，並得到如下結果，

Result i need- 
ip |isp |infection 
---------------------- 
1 |aaaa |malware 
1 |aaaa |ddos 
2 |bbbb |malware 
2 |bbbb |other 
3 |cccc |ddos 
3 |cccc |trojan 
4 |dddd |ddos 
4 |dddd |trojan 
5 |eeee |trojan 
6 |ffff |other 
6 |ffff | 

的問題是我不知道該用什麼方法，對於這種情況，我用這個查詢full join，

SELECT a. * , b. * , c. * 
FROM tbl_1 a 
LEFT OUTER JOIN tbl_2 b 
USING (ip, isp, infection) 
LEFT OUTER JOIN tbl_3 c 
USING (ip, isp, infection) 
UNION 
SELECT a. * , b. * , c. * 
FROM tbl_2 b 
LEFT OUTER JOIN tbl_1 a 
USING (ip, isp, infection) 
LEFT OUTER JOIN tbl_3 c 
USING (ip, isp, infection) 
UNION 
SELECT a. * , b. * , c. * 
FROM tbl_3 c 
LEFT OUTER JOIN tbl_1 a 
USING (ip, isp, infection) 
LEFT OUTER JOIN tbl_2 b 
USING (ip, isp, infection) 

但這給出結果以不同的方式，

Result i get- 
ip |isp |infection ip |isp |infection ip |isp |infection 
---------------------- ---------------------- ---------------------- 
1 |aaaa |malware 1 |aaaa |malware NULL|NULL |NULL 
NULL|NULL |NULL  NULL|NULL |NULL  1 |aaaa |ddos 
2 |bbbb |malware NULL|NULL |NULL  NULL|NULL |NULL 
NULL|NULL |NULL  NULL|NULL |NULL  2 |bbbb |other 
3 |cccc |ddos  3 |cccc |ddos  NULL|NULL |NULL 
3 |cccc |trojan  NULL|NULL |NULL  NULL|NULL |NULL 
4 |dddd |ddos  NULL|NULL |NULL  NULL|NULL |NULL 
NULL|NULL |NULL  4 |dddd |trojan  NULL|NULL |NULL 
NULL|NULL |NULL  5 |eeee |trojan  NULL|NULL |NULL  
NULL|NULL |NULL  6 |ffff |other  NULL|NULL |NULL  
NULL|NULL |NULL  NULL|NULL |NULL  6 |ffff | 

請幫我在這一個，我想顯示只有3列中的數據..

非常感謝你:)

Answer 1

這是簡單的UNION

SELECT ip, isp, infection FROM tbl_1 
UNION 
SELECT ip, isp, infection FROM tbl_2 
UNION 
SELECT ip, isp, infection FROM tbl_3 
ORDER BY IP 

SQLFiddle Demo

Answer 2

SELECT * 
FROM (
     SELECT * FROM tbl_1 
     UNION 
     SELECT * FROM tbl_2 
     UNION 
     SELECT * FROM tbl_3 
     ) AS t 
ORDER BY ip, isp 

Answer 3

你應該UNION三個表，做GROUP BY，以便移除重複：

SELECT ip, isp, infection 
FROM tbl_1 

UNION 

SELECT ip, isp, infection 
FROM tbl_2 

UNION 

SELECT ip, isp, infection 
FROM tbl_3 

GROUP BY ip, isp, infection 

ORDER BY IP 

Answer 4

這不是最優雅的解決方案，但會像這樣的工作？ （假設我有語法正確的......目前無法測試吧）：

SELECT * FROM ((SELECT * FROM tbl_1) UNION (SELECT * FROM tbl_2) UNION (SELECT * FROM tbl_3)) ORDER BY isp DESC, infection DESC;