我有2个表shipments和support_tickets，2个表中的公共元素是tracking_id。我想根据support_tickets表中的条件来计算提供者名称。我试过这个：
SELECT provider,count(provider) as pen_tick_iss
from shipments
inner join support_tickets on shipments.tracking_id=support_tickets.tracking_id
where support_tickets.issue_status = 'Pending'
AND support_tickets.ticket_flag = '1'
AND support_tickets.multi_loc_pickup = '0'
AND support_tickets.status = 'Active'
group BY provider ORDER BY count(provider) DESC
shipments表id tracking_id provider created_date
1 1231232332 fedex 01-09-2017
2 3435435345 fedex 02-09-2017
3 56564564 aramex 03-09-2017
4 535456456 fedex 04-09-2017
5 4565465 delhivery 05-09-2017
6 45656456 fedex 06-09-2017
7 3453453534 fedex 07-09-2017
8 6856865856 delhivery 08-09-2017
9 99923423432 fedex 09-09-2017
10 99923434 delhivery 10-09-2017
11 343343423 aramex 11-09-2017
12 93458345 aramex 12-09-2017
13 435345345 delhivery 13-09-2017
14 3454462136 fedex 14-09-2017
15 989798723 delhivery 15-09-2017
support_tickets表id tracking_id issue_status status ticket_flag created_date
1 1231232332 pending Active 1 01-09-2017
2 3435435345 pending Active 1 11-09-2017
3 56564564 pending Active 1 11-09-2017
4 535456456 fixed Active 15-09-2017
5 4565465 pending Deleted 1 15-09-2017
6 45656456 pending Active 1 15-09-2017
7 3453453534 fixed Active 16-09-2017
8 6856865856 fixed Active 17-09-2017
9 99923423432 pending Active 0 18-09-2017
10 99923434 pending Active 0 19-09-2017
11 343343423 pending Deleted 1 20-09-2017
12 93458345 fixed Active 21-09-2017
13 435345345 pending Active 1 22-09-2017
14 3454462136 pending Active 1 23-09-2017
15 989798723 fixed Active 24-09-2017