摘要: create table Student(Sno char(6) primary key,Sname nvarchar(20) not null,Ssex nchar(1) not null default '男' check(Ssex='男' or Ssex='女'),Sbirthday smal 阅读全文
posted @ 2022-11-22 09:29 菜鸡前来 阅读(163) 评论(0) 推荐(0) 编辑