题解 | #插入记录（二）#
插入记录（二）
https://www.nowcoder.com/practice/9681abf28745468c8adacb3b029a18ce
insert into exam_record_before_2021
(uid,exam_id,start_time,submit_time,score)
select uid,exam_id,start_time,submit_time,score
from exam_record
where year(submit_time) < '2021'
不能复制自增列，需要剔除
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