GDUFS_23_叶炼

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题解 | 月均完成试卷数不小于3的用户爱作答的类别

select tag, count(tag) tag_cnt from exam_record join examination_info using(exam_id) where uid in ( select uid from exam_record inner join...

2025-06-05

0 28

题解 | 修改表

这道题要注意，comment列备注信息也需要修改'''alter table user_infoadd column school varchar(15) after level,change column job profession varchar(10),modify column achi...

2025-05-31

0 41