题解 | #更新记录（二）#
更新记录（二）
http://www.nowcoder.com/practice/0c2e81c6b62e4a0f848fa7693291defc
UPDATE exam_record
set submit_time='2099-01-01 00:00:00',
score=0
where start_time<'2021-09-01 00:00:00'
and submit_time is null;
2021-11-01 21:12 门头沟学院 Java
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