2020年3月17日
2020.03.17 sql语句练习题2.0
摘要： -- 11-- select avg(degree) from school.scores where cno='3-105';-- 12-- select avg(degree) from school.scores where cno like '3%' group by cno having 阅读全文
posted @ 2020-03-17 20:29 ByLir 阅读(187) 评论(0) 推荐(0)