DB2数据库必须掌握的常用语句(五)


  本文标签:DB2数据库 常用语句

  DB2数据库必须掌握的常用语句:

  1、 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

  2、 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

  3、 查询订购的产品至少包含了订单3号中所订购产品的订单

  Select distinct order_no

  From sale_item a

  Where order_no<>3and not exists (

  Select * from sale_item b where order_no =3 and not exists

  (select * from sale_item c where c.order_no=a.order_no and c.prod_id=b.prod_id))

  4、 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)

  5、 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)

  6、 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

  7、 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

  8、 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

  9、 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))

  10、 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)

  11、 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

  12、 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)