我对Postgresql（以及SQL本身）相当新，所以请原谅我，如果我错过了某些东西（是的，我确实尝试过使用搜索）。
我试图使用HAVING子句中查询的结果列的平均值。可能吗？或者有更好的解决方案吗？
我希望Alias＆＃39; Sent_traffic＆＃39;仅显示值大于或等于该列平均值的行。
以下查询是我想要做的（因为HAVING子句而无法工作）：
select p.name, SUM(f.bytes_ab) as Sent_traffic
from pcap_flow f
inner join ports p
ON f.source_ip = p.source_ip AND f.source_port=p.source_port AND p.destination_ip=f.destination_ip AND p.destination_port=f.destination_port
WHERE p.logged_at BETWEEN f.first_packet AND f.last_packet
AND p.logged_at BETWEEN '2016-03-15' AND '2016-04-01'
AND p.name!=''
GROUP BY p.name
HAVING SUM(f.bytes_ba) >= AVG(Sent_traffic)
ORDER BY Sent DESC
LIMIT 10;
在HAVING子句中没有AVG（已发送）的同一查询是什么工作：
select p.name, SUM(f.bytes_ab) as Sent_traffic
from pcap_flow f
inner join ports p
ON f.source_ip = p.source_ip AND f.source_port=p.source_port AND p.destination_ip=f.destination_ip AND p.destination_port=f.destination_port
WHERE p.logged_at BETWEEN f.first_packet AND f.last_packet
AND p.logged_at BETWEEN '2016-03-15' AND '2016-04-01'
AND p.name!=''
GROUP BY p.name
HAVING SUM(f.bytes_ba) >= 999999
ORDER BY Sent DESC
LIMIT 10;
表的快照如下：
表pcap_flow： pcap_flow table in PgAdmin
表端口：
pcap_flow表：
id | pcap_id | flow_code | source_ip | source_port | destination_ip | destination_port | protocol | first_packet | last_packet | status | total_time | total_packets | idle_time_ab | idle_time_ba | bytes_ab | bytes_ba
-------+---------+-----------+---------------------------+-------------+---------------------------+------------------+----------+----------------------------+----------------------------+--------------------------+--------------+---------------+--------------+--------------+----------+----------
1 | 42 | a2b | 192.168.0.22 | 50191 | 128.93.101.81 | 443 | T | 2016-03-25 09:43:46.184039 | 2016-03-25 09:43:55.950184 | reset | 9.766144 | 10 | 9.7053 | 9.7065 | 510 | 3601
2 | 42 | c2d | 192.168.0.22 | 50127 | 74.125.133.189 | 443 | T | 2016-03-25 09:43:46.212468 | 2016-03-25 09:44:04.860872 | reset (syns 0) (fins 1) | 18.648403 | 6 | | | 0 | 0
3 | 42 | e2f | 192.168.0.22 | 50194 | 192.168.0.254 | 80 | T | 2016-03-25 09:43:46.302105 | 2016-03-25 09:43:49.615557 | yes | 3.313451 | 10 | 1.7933 | 2.0006 | 336 | 1421
4 | 42 | g2h | 192.168.0.22 | 50196 | 104.16.27.216 | 80 | T | 2016-03-25 09:43:46.335128 | 2016-03-25 09:43:46.454677 | yes | 0.119549 | 5 | 0.1172 | 0.1162 | 236 | 1705
5 | 42 | i2j | 192.168.0.254 | 443 | 192.168.0.22 | 50190 | T | 2016-03-25 09:43:46.420872 | 2016-03-25 09:43:46.422176 | no (syns 0) (fins 2) | 0.001304 | 6 | 0.0012 | 0.0002 | 2063 | 74
6 | 42 | k2l | 192.168.0.22 | 50197 | 192.168.0.254 | 443 | T | 2016-03-25 09:43:46.457142 | 2016-03-25 09:43:57.94442 | yes | 11.487277 | 26 | 2.001 | 2.001 | 3678 | 18859
7 | 42 | m2n | 192.168.0.22 | 50170 | 192.168.0.254 | 443 | T | 2016-03-25 09:43:46.509135 | 2016-03-25 09:43:46.51023 | reset (syns 0) (fins 2) | 0.001095 | 2 | 0.001 | 0.0001 | 0 | 37
8 | 42 | o2p | 192.168.0.22 | 50161 | 54.149.211.23 | 443 | T | 2016-03-25 09:43:46.510764 | 2016-03-25 09:43:46.512014 | reset (syns 0) (fins 2) | 0.00125 | 3 | 0.0011 | 0 | 37 | 37
9 | 42 | q2r | 192.168.0.22 | 50198 | 192.168.0.254 | 443 | T | 2016-03-25 09:43:46.511504 | 2016-03-25 09:43:46.744645 | reset | 0.233141 | 7 | 0.138 | 0.0981 | 385 | 4342
10 | 42 | s2t | 192.168.0.22 | 50199 | 192.168.0.254 | 443 | T | 2016-03-25 09:43:46.511667 | 2016-03-25 09:43:46.962999 | reset | 0.451332 | 8 | 0.2478 | 0.2018 | 385 | 4342
11 | 42 | u2v | 192.168.0.22 | 50200 | 104.16.27.216 | 80 | T | 2016-03-25 09:43:46.600772 | 2016-03-25 09:43:46.776045 | yes | 0.175273 | 5 | 0.166 | 0.1648 | 463 | 1604
12 | 42 | w2x | 192.168.0.22 | 50201 | 104.16.27.216 | 80 | T | 2016-03-25 09:43:46.606515 | 2016-03-25 09:43:46.760278 | yes | 0.153763 | 6 | 0.1517 | 0.1504 | 463 | 1604
13 | 42 | y2z | 192.168.0.22 | 50163 | 172.217.16.78 | 443 | T | 2016-03-25 09:43:46.744559 | 2016-03-25 09:43:46.746244 | reset (syns 0) (fins 2) | 0.001685 | 3 | 0.0014 | 0.0001 | 37 | 37
14 | 42 | aa2ab | 192.168.0.22 | 50202 | 192.168.0.254 | 443 | T | 2016-03-25 09:43:46.763646 | 2016-03-25 09:43:48.673286 | reset | 1.90964 | 8 | 1.5839 | 1.789 | 397 | 4342
15 | 42 | ac2ad | 192.168.0.22 | 50203 | 104.16.27.216 | 80 | T | 2016-03-25 09:43:46.854744 | 2016-03-25 09:43:46.998117 | yes | 0.143373 | 5 | 0.1414 | 0.1401 | 463 | 1604
ports表：
id | session_id | pid | name | protocol | source_ip | destination_ip | source_port | destination_port | state | logged_at
--------+------------+-------+-------------------------+----------+---------------------------+---------------------------+-------------+------------------+-------+-------------------------
1 | 1 | 676 | svchost.exe | 17 | 0.0.0.0 | | 68 | | 2 | 2016-03-16 09:41:04.716
2 | 1 | 4 | | 17 | 192.168.0.22 | | 137 | | 2 | 2016-03-16 09:41:04.716
3 | 1 | 4 | | 17 | 192.168.0.22 | | 138 | | 2 | 2016-03-16 09:41:04.716
4 | 1 | 3408 | svchost.exe | 17 | 127.0.0.1 | | 1900 | | 2 | 2016-03-16 09:41:04.716
5 | 1 | 3408 | svchost.exe | 17 | 192.168.0.22 | | 1900 | | 2 | 2016-03-16 09:41:04.716
6 | 1 | 3092 | uoipservice.exe | 17 | 192.168.0.22 | | 1900 | | 2 | 2016-03-16 09:41:04.716
7 | 1 | 2208 | mdnsresponder.exe | 17 | 192.168.0.22 | | 5353 | | 2 | 2016-03-16 09:41:04.716
8 | 1 | 1032 | svchost.exe | 17 | 0.0.0.0 | | 5355 | | 2 | 2016-03-16 09:41:04.716
9 | 1 | 2208 | mdnsresponder.exe | 17 | 0.0.0.0 | | 49152 | | 2 | 2016-03-16 09:41:04.716
10 | 1 | 3092 | uoipservice.exe | 17 | 192.168.0.22 | | 51128 | | 2 | 2016-03-16 09:41:04.716
11 | 1 | 3092 | uoipservice.exe | 17 | 192.168.0.22 | | 51129 | | 2 | 2016-03-16 09:41:04.716
12 | 1 | 3408 | svchost.exe | 17 | 192.168.0.22 | | 61182 | | 2 | 2016-03-16 09:41:04.716
13 | 1 | 3408 | svchost.exe | 17 | 127.0.0.1 | | 61183 | | 2 | 2016-03-16 09:41:04.716
14 | 1 | 676 | svchost.exe | 17 | fe80::1d77:665c:b2e5:3be3 | | 546 | | 2 | 2016-03-16 09:41:04.716
15 | 1 | 3408 | svchost.exe | 17 | ::1 | | 1900 | | 2 | 2016-03-16 09:41:04.716
16 | 1 | 3408 | svchost.exe | 17 | fe80::1d77:665c:b2e5:3be3 | | 1900 | | 2 | 2016-03-16 09:41:04.716
17 | 1 | 2208 | mdnsresponder.exe | 17 | ::1 | | 5353 | | 2 | 2016-03-16 09:41:04.716
18 | 1 | 1032 | svchost.exe | 17 | :: | | 5355 | | 2 | 2016-03-16 09:41:04.716
19 | 1 | 2208 | mdnsresponder.exe | 17 | :: | | 49153 | | 2 | 2016-03-16 09:41:04.716
20 | 1 | 3408 | svchost.exe | 17 | fe80::1d77:665c:b2e5:3be3 | | 61180 | | 2 | 2016-03-16 09:41:04.716
21 | 1 | 3408 | svchost.exe | 17 | ::1 | | 61181 | | 2 | 2016-03-16 09:41:04.716
22 | 1 | 972 | svchost.exe | 6 | 0.0.0.0 | 0.0.0.0 | 135 | 0 | 2 | 2016-03-16 09:41:04.716
23 | 1 | 4 | | 6 | 192.168.0.22 | 0.0.0.0 | 139 | 0 | 2 | 2016-03-16 09:41:04.716
24 | 1 | 1728 | devmonsrv.exe | 6 | 127.0.0.1 | 0.0.0.0 | 515 | 0 | 2 | 2016-03-16 09:41:04.716
25 | 1 | 2208 | mdnsresponder.exe | 6 | 127.0.0.1 | 0.0.0.0 | 5354 | 0 | 2 | 2016-03-16 09:41:04.716
26 | 1 | 2564 | hostviewcli.exe | 6 | 127.0.0.1 | 0.0.0.0 | 40123 | 0 | 2 | 2016-03-16 09:41:04.716
27 | 1 | 716 | wininit.exe | 6 | 0.0.0.0 | 0.0.0.0 | 49152 | 0 | 2 | 2016-03-16 09:41:04.716
28 | 1 | 676 | svchost.exe | 6 | 0.0.0.0 | 0.0.0.0 | 49153 | 0 | 2 | 2016-03-16 09:41:04.716
29 | 1 | 1076 | svchost.exe | 6 | 0.0.0.0 | 0.0.0.0 | 49154 | 0 | 2 | 2016-03-16 09:41:04.716
30 | 1 | 772 | services.exe | 6 | 0.0.0.0 | 0.0.0.0 | 49155 | 0 | 2 | 2016-03-16 09:41:04.716
31 | 1 | 4872 | vpnui.exe | 6 | 127.0.0.1 | 127.0.0.1 | 49156 | 62522 | 5 | 2016-03-16 09:41:04.716
32 | 1 | 788 | lsass.exe | 6 | 0.0.0.0 | 0.0.0.0 | 49157 | 0 | 2 | 2016-03-16 09:41:04.716
33 | 1 | 3092 | uoipservice.exe | 6 | 192.168.0.22 | 0.0.0.0 | 49164 | 0 | 2 | 2016-03-16 09:41:04.716