题解 | #更新记录(二)#
更新记录(二)
http://www.nowcoder.com/practice/0c2e81c6b62e4a0f848fa7693291defc
关键词:未完成作答,所以应该是完成时间为空的值 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;