摘要: 3.(1)Create view t1(sno,sname,sdept,cno,cname,credit) As Select s.sno ,s.sname,s.dept,c.cno,c.cname,c.credit From student s join course c on s.sno=c.s 阅读全文
posted @ 2024-05-29 23:10 涨涨涨张 阅读(6) 评论(0) 推荐(0) 编辑