1、（1）查询person表中所有不重复的职称
use pay115
select distinct professor
from person
（2）查询person中男员工的信息
use pay115
select *
from person
where sex = ‘男’
（3）查询person表中00102部门女员工的信息
use pay115
select *
from person
where sex = ‘女’ and deptno = ‘00102’
（4）查询000001员工的基本工资增长1.5倍后的实际收入
use pay115
select base*1.5+bonus–deduct as real_fact
from pay
where no = ‘000001’
（5）查询00102部门的员工的基本信息和工资情况，按实发工资降序排列
use pay115
select *
from person left outer join pay on (person.No = pay.no)
where person.DeptNo = ‘00102’
order by fact desc
（6）查询各部门2005年实发工资总数
use pay115
select deptno as 部门,sum(fact) as 总额
from pay,person
where pay.no=person.no and year=2005
group by deptno
（7）查询2005年1月平均奖金不少于400的部门，按平均奖金升序排列
use pay115
select dept.deptno,deptname ,avg(bonus) as 平均奖金
from dept,person,pay
where year = 2005 and month = 1 and dept.deptno = person.DeptNo and pay.No = person.No
group by dept.deptno,deptname
having avg(bonus)>=400
order by avg(bonus) asc
（8）查询市场部所有员工姓名和2005年1月工资明细
use pay115
select name,base,bonus,deduct,fact
from person,pay,dept
where person.no = pay.no and year = 2005 and month = 1 and dept.deptname = ‘市场部’ and dept.DeptNo = person.DeptNo
2、利用SQL语句嵌套查询
（1）查询2005年1月比000001员工实发工资高的所有员工的基本信息
use pay115
select *
from person
where no in
(
select no from pay
where year = 2005 and month = 1 and
fact>(select fact from pay
where year = 2005 and month = 1 and no = ‘000001’)
)
（2）查询2005年1月比00102部门的所有员工实发工资都高的员工信息
use pay115
select *
from person
where no in
(
select no from pay
where year = 2005 and month = 1 and
fact>(select max(fact)
from pay,person
where year = 2005 and month = 1 and deptno = ‘00102’ and person.no = pay.no)
)
（3）查询2005年1月比所有员工平均实发工资都高的员工基本信息和工资明细
use pay115
select *
from person,pay
where person.no = pay.no and pay.no in
(
select no from pay
where year = 2005 and month = 1 and
fact>(select avg(fact)
from pay
where year = 2005 and month = 1)
)
3、利用SQL语句创建视图
（1）在基表person基础上创建员工视图view_person，其中包括工号，姓名、性别、职称、部门代码字段
create view dbo.view_person(No,Name,Sex,professor,deptno)
as
select no,name,sex,professor,deptno
from dbo.person
（2）
create view dbo.view_pay(year,month,no,name,sex,professor,deptname,base,bonus,deduct,fact)
as
select year,month,person.no,name,sex,professor,deptname,base,bonus,deduct,fact
from dbo.person,dbo.pay,dbo.dept
where dept.DeptNo = person.DeptNo and person.no = pay.no
三、SQL查询语言实验：
补充题：必做题4题，另外书上例题自选2题：
1、查询平均成绩大于60分的课程的课程号和平均成绩。
use school
select cno,avg(grade) from sc group by cno having avg(grade)>60
2、查询没有选修“数据库”课程的学生的学号和姓名。
use school
select sno,sname
from student
where sno not in
(select sno
from sc,course
where cname = ‘数据库’ and course.cno = sc.cno)
3、查询选修人数超过2人的课程的课程号（如果加课程名称，可以实现吗?）和学生人数。查询结果按人数降序排列，若人数相同，按课程号升序排列。
use school
select cno,count(sno)
from sc
group by cno
having count(sno)>2
order by count(sno) desc,cno asc
加课程名：
use school
select sc.cno,count(sno),cname
from sc,course
where course.cno = sc.cno
group by sc.cno,cname
having count(sno)>1
order by count(sno) desc,cno asc
4、创建视图view_sc,查询有学生选修的课程的课程号，课程名，学分和选修人数。
create view view_sc(cno,cname,ccredit, 选课人数)
as
select course.cno,cname,ccredit,count(sno)
from course,sc
where course.cno = sc.cno
group by course.cno,cname,ccredit
having count(sno)>0
例3.22 查询计算机科学系全体学生的名单
select sname
from student
where sdept = ‘cs’
