题解 | 更新记录(二)
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
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
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