数据库系统查询操作练习题6-子查询、集合查询

说明：

根据题目要求编写下列题目的代码，运行代码得出正确结果后把代码复制到题号的下面，最后在文件名前加上学号和姓名（例：55+张三+查询操作练习题6-子查询、集合查询），并提交文件到教师机。（各数据表参考教材中的教务管理数据库）

一、以下题目要求使用子查询实现：

1.查询任教01002课程的教师的姓名和性别。（分别用IN和EXISTS实现）

/* IN 方法*/

select tname,tsex from Teacher

where tno IN(select tno from teaching where cno ='01002')

/* EXISTS 方法*/

select tname,tsex from Teacher

where EXISTS(select*from teaching where cno ='01002'and= 2.查询“08软件”班的学生信息。（分别用IN和EXISTS实现）/* IN 方法*/

select*from student

where clno IN(select clno from class where clname ='08软件') /* EXISTS 方法*/

select*from student

where EXISTS(select*from class where clname ='08软件'and

=

3.查询“计算机系”男教师的姓名和职称。

select tname,tsex,ttitle from teacher

where tsex='男'and dno IN(select dno from department where dname ='计算机系')

4.查询任教“计算机网络”课程的教师的姓名、性别和职称。select tname,tsex,ttitle from teacher

where EXISTS(select*from teaching

where EXISTS(select*from course

where cname ='计算机网络'and=

and=

5．查询“计算机系”教师所教的课程名。

select cname from course where cno in

(select cno from teaching where tno in

(select tno from teacher where dno in

(select dno from department where dname ='计算机系')))

6．查询哪些教师没有授课任务，显示其姓名、性别和职称。select tname,tsex,ttitle from teacher where tno not in (select tno from teaching)

7．查询基本工资大于所有岗位津贴的教师的姓名、职称和基本工资

select tname,ttitle,jbgz from teacher where jbgz >all (select jt from teacher )

二、以下题目要求使用集合查询实现：

1．查询职称是“教授”或“副教授”的教师的姓名和职称。select tname,ttitle from teacher where ttitle ='教授' union

select tname,ttitle from teacher where ttitle ='副教授' 2．查询职称是“教授”且是“计算机系”的教师的姓名。select tname,ttitle from teacher where tname='教授' intersect

select tname,ttitle from teacher where dno in

(select dname from department where dname ='计算机系')

3．查询哪些课程没有任课教师，显示其课程号。

select cno from course

except

select tno from teaching