SQL过关(SQLServer)

1、基本表结构

（1）/*员工人事表employee */

emp_no	char(5)	Not null	primary key	员工编号
emp_name	char(10)	Not null		员工姓名
sex	char(1)	Not null		性别
dept	char(4)	Not null		所属部门
title	char(6)	Not null		职称
date_hired	datetime	Not null		到职日
birthday	datetime	Null		生日
salary	int	Not null		薪水
addr	char(50)	null		住址
Mod­_date	datetime	Default(getdate())	操作者

（2）/*客户表customer */

cust_id	char(5)	Not null	primary key	客户号
cust_name	char(20)	Not null,		客户名称
addr	char(40)	Not null,		客户住址
tel_no	char(10)	Not null,		客户电话
zip	char(6)	null		邮政编码

（3）/*销售主表sales */

order_no	int	Not null	primary key	订单编号
cust_id	char(5)	Not null,		客户号
sale_id	char(5)	Not null,		业务员编号
tot_amt	numeric(9,2)	Not null,		订单金额
order_date	datetime	Not null,		订货日期
ship_date	datetime	Not null,		出货日期
invoice_no	char(10)	Not null		发票号码

（4）/*销货明细表sale_item */

order_no	int	Not null,	primary key	订单编号
prod_id	char(5)	Not null,	产品编号
qty	int	Not null		销售数量
unit_price	numeric(7,2)	Not null		单价
order_date	datetime	null		订单日期

（5）/*产品名称表product */

prod_id	char(5)	Not null	primary key	产品编号
prod_name	char(20)	Not null		产品名称

2、各种查询的SQL语句

问题1、查找员工的编号、姓名、部门和出生日期，如果出生日期为空值，显示日期不详,并按部门排序输出,日期格式为yyyy-mm-dd。

select emp_no ,emp_name ,dept ,
       isnull(convert(char(10),birthday,120),'日期不详') birthday
from employee
order by dept

 

问题2、按部门进行汇总，统计每个部门的总工资

select dept,sum(salary)
from employee
group by dept

 

问题3、查找商品名称为14寸显示器商品的销售情况，显示该商品的编号、销售数量、单价和金额

select a.prod_id,qty,unit_price,unit_price*qty totprice
from sale_item a,product b
where a.prod_id=b.prod_id and prod_name='14寸显示器'

 

问题4、在销售明细表中按产品编号进行汇总，统计每种产品的销售数量和金额

select prod_id,sum(qty) totqty,sum(qty*unit_price) totprice
from sale_item
group by prod_id

 

问题5、使用convert函数按客户编号统计每个客户1996年的订单总金额

select cust_id,sum(tot_amt) totprice
from sales
where convert(char(4),order_date,120)='1996'
group by cust_id

 

问题6、查找有销售记录的客户编号、名称和订单总额

select a.cust_id,cust_name,sum(tot_amt) totprice
from customer a,sales b
where a.cust_id=b.cust_id
group by a.cust_id,cust_name

 

问题7、查找在1997年中有销售记录的客户编号、名称和订单总额

select a.cust_id,cust_name,sum(tot_amt) totprice
from customer a,sales b
where a.cust_id=b.cust_id and convert(char(4),order_date,120)='1997'
group by a.cust_id,cust_name

 

问题8、查找一次销售最大的销售记录

select order_no,cust_id,sale_id,tot_amt
from sales
where tot_amt=
   (select max(tot_amt)
    from sales)

 

问题9、查找至少有3次销售的业务员名单和销售日期

select emp_name,order_date
from employee a,sales b 
where emp_no=sale_id and a.emp_no in
  (select sale_id
   from sales
   group by sale_id
   having count(*)>=3)
order by emp_name

 

问题10、用存在量词查找没有订货记录的客户名称

select cust_name
from customer a
where not exists
   (select *
    from sales b
    where a.cust_id=b.cust_id)

 

问题11、使用左外连接查找每个客户的客户编号、名称、订货日期、订单金额；订货日期不要显示时间，日期格式为yyyy-mm-dd；按客户编号排序，同一客户再按订单降序排序输出

select a.cust_id,cust_name,convert(char(10),order_date,120),tot_amt
from customer a left outer join sales b on a.cust_id=b.cust_id
order by a.cust_id,tot_amt desc

 

问题12、查找16M DRAM的销售情况，要求显示相应的销售员的姓名、性别，销售日期、销售数量和金额，其中性别用男、女表示

select emp_name 姓名, 性别= case a.sex  when 'm' then '男'
                                       when 'f' then '女' 
                                       else '未'
                                       end,
        销售日期= isnull(convert(char(10),c.order_date,120),'日期不详'),
        qty 数量, qty*unit_price as 金额
from employee a, sales b, sale_item c,product d
where d.prod_name='16M DRAM' and d.pro_id=c.prod_id and
      a.emp_no=b.sale_id and b.order_no=c.order_no

 

问题13、查找每个人的销售记录，要求显示销售员的编号、姓名、性别、产品名称、数量、单价、金额和销售日期

select emp_no 编号,emp_name 姓名, 性别= case a.sex when 'm' then '男'
                                       when 'f' then '女' 
                                       else '未'
                                       end,
      prod_name 产品名称,销售日期= isnull(convert(char(10),c.order_date,120),'日期不详'),
      qty 数量, qty*unit_price as 金额
from employee a left outer join sales b on a.emp_no=b.sale_id , sale_item c,product d
where d.pro_id=c.prod_id and b.order_no=c.order_no

 

问题14、查找销售金额最大的客户名称和总货款

select cust_name,d.cust_sum
from   customer a,
       (select cust_id,cust_sum
        from (select cust_id, sum(tot_amt) as cust_sum
              from sales
              group by cust_id ) b
        where b.cust_sum = 
               ( select max(cust_sum)
                 from (select cust_id, sum(tot_amt) as cust_sum
                       from sales
                       group by cust_id ) c )
        ) d
where a.cust_id=d.cust_id

 

问题15、查找销售总额少于1000元的销售员编号、姓名和销售额

select emp_no,emp_name,d.sale_sum
from   employee a,
       (select sale_id,sale_sum
        from (select sale_id, sum(tot_amt) as sale_sum
              from sales
              group by sale_id ) b
        where b.sale_sum <1000               
        ) d
where a.emp_no=d.sale_id

 

问题16、查找至少销售了3种商品的客户编号、客户名称、商品编号、商品名称、数量和金额

select a.cust_id,cust_name,b.prod_id,prod_name,d.qty,d.qty*d.unit_price
from customer a, product b, sales c, sale_item d
where a.cust_id=c.cust_id and d.prod_id=b.prod_id and 
      c.order_no=d.order_no and a.cust_id in (
      select cust_id
      from  (select cust_id,count(distinct prod_id) prodid
             from (select cust_id,prod_id
                   from sales e,sale_item f
                   where e.order_no=f.order_no) g
             group by cust_id
             having count(distinct prod_id)>=3) h )

 

问题17、查找至少与世界技术开发公司销售相同的客户编号、名称和商品编号、商品名称、数量和金额

select a.cust_id,cust_name,d.prod_id,prod_name,qty,qty*unit_price
from customer a, product b, sales c, sale_item d
where a.cust_id=c.cust_id and d.prod_id=b.prod_id and 
      c.order_no=d.order_no  and not exists
  (select f.*
   from customer x ,sales e, sale_item f
   where cust_name='世界技术开发公司' and x.cust_id=e.cust_id and
         e.order_no=f.order_no and not exists
           ( select g.*
             from sale_item g, sales  h
             where g.prod_id = f.prod_id and g.order_no=h.order_no and
                   h.cust_id=a.cust_id)
    )

 

问题18、查找表中所有姓刘的职工的工号，部门，薪水

select emp_no,emp_name,dept,salary
from employee
where emp_name like '刘%'

 

问题19、查找所有定单金额高于20000的所有客户编号

select cust_id
from sales
where tot_amt>20000

 

问题20、统计表中员工的薪水在40000-60000之间的人数

select count(*)as 人数
from employee
where salary between 40000 and 60000

 

问题21、查询表中的同一部门的职工的平均工资，但只查询＂住址＂是＂上海市＂的员工

select avg(salary) avg_sal,dept 
from employee 
where addr like '上海市%'
group by dept

 

问题22、将表中住址为"上海市"的员工住址改为"北京市"

update employee  
set addr like '北京市'
where addr like '上海市'

 

问题23、查找业务部或会计部的女员工的基本信息

select emp_no,emp_name,dept
from employee 
where sex='F'and dept in ('业务','会计')

 

问题24、显示每种产品的销售金额总和，并依销售金额由大到小输出

select prod_id ,sum(qty*unit_price)
from sale_item 
group by prod_id
order by sum(qty*unit_price) desc

 

问题25、选取编号界于‘C0001’和‘C0004’的客户编号、客户名称、客户地址。

select CUST_ID,cust_name,addr
from customer 
where cust_id between 'C0001' AND 'C0004'

 

问题26、计算出一共销售了几种产品

select count(distinct prod_id) as '共销售产品数'
from sale_item

 

问题27、将业务部员工的薪水上调3%

update employee
set salary=salary*1.03
where dept='业务'

 

问题28、由employee表中查找出薪水最低的员工信息

select *
from employee
where salary=
       (select min(salary )
        from employee )

 

问题29、使用join查询客户姓名为"客户丙"所购货物的"客户名称","定单金额","定货日期","电话号码"

select a.cust_id,b.tot_amt,b.order_date,a.tel_no
from customer a join sales b
on a.cust_id=b.cust_id and cust_name like '客户丙'

 

问题30、由sales表中查找出订单金额大于“E0013业务员在1996/10/15这天所接每一张订单的金额”的所有订单

select *
from sales
where tot_amt>all
       (select tot_amt 
        from sales 
        where sale_id='E0013'and order_date='1996/10/15')
order by tot_amt

 

问题31、计算'P0001'产品的平均销售单价

select avg(unit_price)
from sale_item
where prod_id='P0001'

 

问题32、找出公司女员工所接的定单

select sale_id,tot_amt
from sales
where sale_id in 
(select sale_id from employee
where sex='F')

 

问题33、找出同一天进入公司服务的员工

select a.emp_no,a.emp_name,a.date_hired
from employee a
join employee b
on (a.emp_no!=b.emp_no and a.date_hired=b.date_hired)
order by a.date_hired

 

问题34、找出目前业绩超过232000元的员工编号和姓名

select emp_no,emp_name
from employee 
where emp_no in
(select sale_id
from sales 
group by sale_id
having sum(tot_amt)<232000)

 

问题35、查询出employee表中所有女职工的平均工资和住址在＂上海市＂的所有女职工的平均工资

select avg(salary)
from employee
where sex like 'f'
union
select avg(salary)
from employee
where sex like 'f' and addr like '上海市%'

 

问题36、在employee表中查询薪水超过员工平均薪水的员工信息

Select * from employee where salary>(select avg(salary)  from employee)

 

问题37、找出目前销售业绩超过40000元的业务员编号及销售业绩，并按销售业绩从大到小排序

Select sale_id ,sum(tot_amt)
from sales 
group by sale_id 
having sum(tot_amt)>40000
order by sum(tot_amt) desc

 

问题38、找出公司男业务员所接且订单金额超过2000元的订单号及订单金额

Select order_no,tot_amt
From sales ,employee
Where sale_id=emp_no and sex='M' and tot_amt>2000

 

问题39、查询sales表中订单金额最高的订单号及订单金额

Select order_no,tot_amt from sales where tot_amt=(select max(tot_amt)  from sales)

 

问题40、查询在每张订单中订购金额超过24000元的客户名及其地址

Select cust_name,addr from customer a,sales b where a.cust_id=b.cust_id and tot_amt>24000

 

问题41、求出每位客户的总订购金额，显示出客户号及总订购金额，并按总订购金额降序排列

Select cust_id,sum(tot_amt) from sales
Group by cust_id 
Order by sum(tot_amt) desc

 

问题42、求每位客户订购的每种产品的总数量及平均单价，并按客户号，产品号从小到大排列

Select cust_id,prod_id,sum(qty),sum(qty*unit_price)/sum(qty)
From sales a, sale_item b
Where a.order_no=b.order_no
Group by cust_id,prod_id
Order by cust_id,prod_id

 

问题43、查询订购了三种以上产品的订单号

Select order_no from sale_item
Group by order_no
Having count(*)>3

 

问题44、查询订购的产品至少包含了订单10003中所订购产品的订单

Select  distinct order_no
From sale_item a
Where  order_no<>'10003'and  not exists ( 
       Select *  from sale_item b where order_no ='10003'  and not exists 
              (select *  from sale_item c where c.order_no=a.order_no  and  c.prod_id=b.prod_id))

 

问题45、在sales表中查找出订单金额大于“E0013业务员在1996/11/10这天所接每一张订单的金额”的所有订单，并显示承接这些订单的业务员和该订单的金额

Select sale_id,tot_amt 
from sales
where tot_amt>all(select tot_amt from sales where sale_id='E0013' and order_date='1996/11/10')

 

问题46、查询末承接业务的员工的信息

Select *
From employee a
Where not exists 
         (select * from  sales b where  a.emp_no=b.sale_id)

 

问题47、查询来自上海市的客户的姓名，电话、订单号及订单金额

Select cust_name,tel_no,order_no,tot_amt
From customer a ,sales b
Where a.cust_id=b.cust_id and addr='上海市'

 

问题48、查询每位业务员各个月的业绩，并按业务员编号、月份降序排序

Select sale_id,month(order_date), sum(tot_amt) 
from sales 
group by sale_id,month(order_date)
order by sale_id,month(order_date) desc

 

问题49、求每种产品的总销售数量及总销售金额，要求显示出产品编号、产品名称，总数量及总金额，并按产品号从小到大排列

Select a.prod_id,prod_name,sum(qty),sum(qty*unit_price)
From sale_item a,product b
Where a.prod_id=b.prod_id 
Group by a.prod_id,prod_name
Order by a.prod_id

 

问题50、查询总订购金额超过’C0002’客户的总订购金额的客户号，客户名及其住址

Select cust_id, cust_name,addr
From customer
Where cust_id  in (select cust_id from sales 
Group by cust_id
Having sum(tot_amt)>
        (Select sum(tot_amt) from sales  where cust_id='C0002'))

 

问题51、查询业绩最好的的业务员号、业务员名及其总销售金额

select emp_no,emp_name,sum(tot_amt)
from employee a,sales b
where a.emp_no=b.sale_id
group by emp_no,emp_name
having sum(tot_amt)=
         (select max(totamt)
          from (select sale_id,sum(tot_amt) totamt
               from sales
               group by sale_id) c)

 

问题52、查询每位客户所订购的每种产品的详细清单，要求显示出客户号，客户名，产品号，产品名，数量及单价

select a.cust_id, cust_name,c.prod_id,prod_name,qty, unit_price
from customer a,sales b, sale_item c ,product d
where a.cust_id=b.cust_id and b.order_no=c.order_no and c.prod_id=d.prod_id

 

问题53、求各部门的平均薪水，要求按平均薪水从小到大排序

select dept,avg(salary) from employee group by dept order by avg(salary)