题解 | #插入记录（二）#
插入记录（二）
http://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 start_time < '2021-01-01' and submit_time is not null
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