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 )
时间: 2024-11-06 03:30:58