题解 | #更新记录(二)#
更新记录(二)
https://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 score is null;
set 改动1, 改动二 (中间用逗号隔开 有空格 不能用and)