select uid, if(act_month_total is null,0,act_month_total), if(act_days_2021 is null,0,act_days_2021), if(act_days_2021_exam is null,0,act_days_2021_exam), if(act_days_2021_question is null,0,act_days_2021_question) from #表1:符合条件的uid (select uid from user_info where level between 6 and 7) as T1 lef...