题解 | #更新记录(二)#
更新记录(二)
http://www.nowcoder.com/practice/0c2e81c6b62e4a0f848fa7693291defc
根据条件 start_time 和 submit_time
update exam_record set score = 0,submit_time = '2099-01-01 00:00:00' where start_time < '2021-09-01' and submit_time is NULL