DB2比较常用与实用sql语句总结
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。
代码如下:
select emp_no,emp_name,dept,isnull(convert(char(10),birthday,120),'日期不详') birthday
from employee
order by dept
2、查找与喻自强在同一个单位的员工姓名、性别、部门和职称
代码如下:
select emp_no,emp_name,dept,title
from employee
where emp_name<>'喻自强' and dept in
(select dept from employee
where emp_name='喻自强')
select dept,sum(salary)
from employee
group by dept
4、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
代码如下:
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'
5、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
代码如下:
select prod_id,sum(qty) totqty,sum(qty*unit_price) totprice
from sale_item
group by prod_id
6、使用convert函数按客户编号统计每个客户1996年的订单总金额
代码如下:
select cust_id,sum(tot_amt) totprice
from sales
where convert(char(4),order_date,120)='1996'
group by cust_id
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
8、查找在1997年中有销售记录的客户编号、名称和订单总额
代码如下:
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
select order_no,cust_id,sale_id,tot_amt
from sales
where tot_amt=
(select max(tot_amt)
from sales)
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
select cust_name
from customer a
where not exists
(select *
from sales b
where a.cust_id=b.cust_id)
12、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
代码如下:
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
13、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
代码如下:
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.prod_id=c.prod_id and
a.emp_no=b.sale_id and b.order_no=c.order_no
14、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
代码如下:
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.prod_id=c.prod_id and b.order_no=c.order_no
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
16、查找销售总额少于1000元的销售员编号、姓名和销售额
代码如下:
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
17、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
代码如下:
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 )
18、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
代码如下:
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)
)
select emp_no,emp_name,dept,salary
from employee
where emp_name like '刘%'
20、查找所有定单金额高于2000的所有客户编号
代码如下:
select cust_id
from sales
where tot_amt>2000
21、统计表中员工的薪水在4000-6000之间的人数
代码如下:
select count(*)as 人数
from employee
where salary between 4000 and 6000
22、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
代码如下:
select avg(salary) avg_sal,dept
from employee
where addr like '上海市%'
group by dept
23、将表中住址为"上海市"的员工住址改为"北京市"
代码如下:
update employee
set addr like '北京市'
where addr like '上海市'
select emp_no,emp_name,dept
from employee
where sex='F'and dept in ('业务','会计')
25、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。
代码如下:
select prod_id ,sum(qty*unit_price)
from sale_item
group by prod_id
order by sum(qty*unit_price) desc
26、选取编号界于'C0001'和'C0004'的客户编号、客户名称、客户地址。
代码如下:
select CUST_ID,cust_name,addr
from customer
where cust_id between 'C0001' AND 'C0004'
select count(distinct prod_id) as '共销售产品数'
from sale_item
update employee
set salary=salary*1.03
where dept='业务'
29、由employee表中查找出薪水最低的员工信息。
代码如下:
select *
from employee
where salary=
(select min(salary )
from employee )
30、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"
代码如下:
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'
31、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。
代码如下:
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
select avg(unit_price)
from sale_item
where prod_id='P0001'
select sale_id,tot_amt
from sales
where sale_id in
(select sale_id from employee
where sex='F')
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
35、找出目前业绩超过232000元的员工编号和姓名。
代码如下:
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)