DB2數(shù)據(jù)庫必須掌握的常用語句（三）
DB2數(shù)據(jù)庫的常用語句之前已經(jīng)為大家介紹了很多，本文將繼續(xù)講述DB2數(shù)據(jù)庫常用語句。
1、統(tǒng)計(jì)表中員工的薪水在4000-6000之間的人數(shù)
select count(*)as 人數(shù)
from employee
where salary between 4000 and 6000
2、查詢表中的同一部門的職工的平均工資，但只查詢"住址"是"上海市"的員工
select avg(salary) avg_sal,dept
from employee
where addr like '上海市%'
group by dept
3、將表中住址為"上海市"的員工住址改為"北京市"
update employee
set addr like '北京市'
where addr like '上海市'
4、查找業(yè)務(wù)部或會計(jì)部的女員工的基本信息
select emp_no,emp_name,dept
from employee
where sex='F'and dept in ('業(yè)務(wù)','會計(jì)')
5、顯示每種產(chǎn)品的銷售金額總和，并依銷售金額由大到小輸出
select prod_id ,sum(qty*unit_price)
from sale_item
group by prod_id
order by sum(qty*unit_price) desc
6、選取編號界于'C0001'和'C0004'的客戶編號、客戶名稱、客戶地址
select CUST_ID,cust_name,addr
from customer
where cust_id between 'C0001' AND 'C0004'
7、計(jì)算出一共銷售了幾種產(chǎn)品
select count(distinct prod_id) as '共銷售產(chǎn)品數(shù)'
from sale_item
8、將業(yè)務(wù)部員工的薪水上調(diào)3%
update employee
set salary=salary*1.03
where dept='業(yè)務(wù)'
9、由employee表中查找出薪水最低的員工信息
select *
from employee
where salary=
(select min(salary )
from employee )
10、使用join查詢客戶姓名為"客戶丙"所購貨物的"客戶名稱","定單金額","定貨日期","電話號碼"
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 '客戶丙'
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