摘要: create table student(Sno char(7) primary key,Sname char(10) not null,Ssex char(2),Sage tinyint,Sdept char(20)) create table Course(Cno char(10) not nu 阅读全文
posted @ 2019-12-09 15:34 渔阳俊俊 阅读(167) 评论(0) 推荐(0) 编辑