******常见数据库笔试题*****

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

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

)