数据库笔试题

1、

学生表：Student 学生表 (学号，姓名，性别，年龄，组织部门)

           Course 课程表 (编号，课程名称)

               Sc 选课表 (学号，课程编号，成绩)

表结构如下：

(1).写一个SQL语句，查询选修了’计算机原理’的学生学号和姓名

(2).写一个SQL语句，查询’周星驰’同学选修了的课程名字

(3).写一个SQL语句，查询选修了5门课程的学生学号和姓名

（1）     

select sno,sname
              from student
              where sno in (
                            select sno
                            from sc
                            where cno = (
                                          select cno
                                          from course
                                          where cname=‘计算机原理‘
                                           )
                             )

 (2)            

select cname
              from course
              where cno in (
                            select cno
                           from sc
                            where sno =
                                   (
                                       select sno
                                      from student
                                       where sname=‘周星驰‘
                          )
                                   )

(3)           

select sno,sname
             From student
             Where sno in (
                            select sno
                            from sc
                            group by sno having count(sno)=5
                )

本文出自 “闲庭信步、” 博客，请务必保留此出处http://macxiao.blog.51cto.com/9606147/1589170