设置日期

SET @start_date = '2023-11-17';
SET @end_date = '2023-11-20';

select a.city,b.t2-a.t1  from 
(select city,wework_gft_group_user_cnt t1  from fc_sr_day_wework_user_stat
  where d_day = @start_date
  group by city) a
  join
 (select city,wework_gft_group_user_cnt t2 from fc_sr_day_wework_user_stat
  where d_day=@end_date
  group by city)
  b
  on a.city=b.city
  ;