经典数据库入门

 

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yyyymmdd。

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
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')

3、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

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
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

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

7、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

8、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

9、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)

10、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

11、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)

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yyyymmdd 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

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
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
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

15、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

16、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

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
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

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) )

19、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%'

20、查找所有定单金额高于2000的所有客户编号
select cust_id from sales where tot_amt>2000

21、统计表中员工的薪水在40006000之间的人数
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
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
update employee set addr like '北京市' where addr like '上海市'

24、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')

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

27、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 28、将业务部员工的薪水上调3%。

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。

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
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。
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

32、计算'P0001'产品的平均销售单价
select avg(unit_price) from sale_item where prod_id='P0001'

33、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')

34、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

35、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)

36、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%'

37、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)

38、 找出目前销售业绩超过10000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)>10000 order by sum(tot_amt) desc

39、 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

40、 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)

41、 查询在每张订单中订购金额超过4000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>4000
42、 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

43、 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

44、 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

45、 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<>'3'and 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))

46、 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='19961110')

47、 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)

48、 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'

49、 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

50、 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

51、 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'))

52、 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)

53、 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

54、 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) 55、导入数据 imp80 system/manager@orcl file=D:/TEMP/dbfile1.dmp full=n fromuser=yh1 touser=yh2; 56、多表更新 update table1 a set a.column1=(select b.column1 from table2 b where a.column2=b.2column2) where a.column3 is not null;