select a.`code` as trainAidCode, r.id as recordId, c.id as contentId, c.content, c.level, r.start_time as startTime, avg(tr.finish_result) as finishResult
select a.`code` as trainAidCode, r.id as recordId, r.train_type as trainType,
c.id as contentId, c.content, c.level, r.start_time as startTime, avg(tr.finish_result) as finishResult
from u_train_record r
left join t_train_content c on r.question_id = c.id and c.rec_status = 0
left join t_train_aid a on c.aid_id = a.id and a.rec_status = 0
select a.`code` as trainAidCode, r.id as recordId, c.id as contentId, c.content, c.level, r.start_time as startTime, avg(tr.finish_result) as finishResult
select a.`code` as trainAidCode, r.id as recordId, r.train_type as trainType,
c.id as contentId, c.content, c.level, r.start_time as startTime, avg(tr.finish_result) as finishResult
from u_train_record r
left join t_train_content c on r.question_id = c.id and c.rec_status = 0
left join t_train_aid a on c.aid_id = a.id and a.rec_status = 0