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：2013111055+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 teacher.tno=teaching.tno) 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 student.clno = class.clno) 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 teaching.cno=course.cno) and teacher.tno=teaching.tno) 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

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