课例复制

思考题四

最近，经过你的努力，你得到了一份工作，成为了百货公司的一位经理。

到位后，你发现你的销售数据库中有两张表，一个是商店促销时间的日历，另一个是在促销期间的销售额列表。

你需要编写一个查询，告诉我们在每次促销中哪位职员的销售额最高，这样可以给那个职员发绩效奖金。

-- 商店促销时间的日历

create table promotions (

	promo_name varchar2(50) not null primary key,  -- 促销活动名称

	start_date date not null,                      -- 开始时间

	end_date date not null,                        -- 终止时间

	check(start_date<=end_date)

);

-- 促销期间的销售额表 （注意：该表只是保存促销期间的销售额）

create table sales

(

	ticket_nbr int not null primary key,  --销售票据编号 （自增）

	clerk_name varchar2(20) not null,     --销售员姓名

	sale_date date not null,              --销售日期

	sale_amount number(9,2) not null      --销售金额

);

insert into promotions values('spring sales',to_date('2009-2-1','yyyy/mm/dd'),to_date('2009-2-15','yyyy/mm/dd'));

insert into promotions values('worker sale',to_date('2009-5-1','yyyy/mm/dd'),to_date('2009-5-4','yyyy/mm/dd'));

insert into promotions values('children sale',to_date('2009-6-1','yyyy/mm/dd'),to_date('2009-6-1','yyyy/mm/dd'));

insert into promotions values('national day sale',to_date('2009-10-1','yyyy/mm/dd'),to_date('2009-10-7','yyyy/mm/dd'));

create sequence seq_nbr;

insert into sales values(seq_nbr.nextval,'david',to_date('2009-2-1','yyyy/mm/dd'),30);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-1','yyyy/mm/dd'),73);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-1','yyyy/mm/dd'),110);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-2','yyyy/mm/dd'),190);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-2','yyyy/mm/dd'),30);

insert into sales values(seq_nbr.nextval,'david',to_date('2009-2-2','yyyy/mm/dd'),92);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-3','yyyy/mm/dd'),130);

insert into sales values(seq_nbr.nextval,'david',to_date('2009-2-3','yyyy/mm/dd'),90);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-3','yyyy/mm/dd'),110);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-4','yyyy/mm/dd'),70);

insert into sales values(seq_nbr.nextval,'david',to_date('2009-2-4','yyyy/mm/dd'),9);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-5','yyyy/mm/dd'),88);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-5','yyyy/mm/dd'),70);

insert into sales values(seq_nbr.nextval,'david',to_date('2009-2-13','yyyy/mm/dd'),50);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-13','yyyy/mm/dd'),170);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-14','yyyy/mm/dd'),270);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-15','yyyy/mm/dd'),67.5);

insert into sales values(seq_nbr.nextval,'david',to_date('2009-5-1','yyyy/mm/dd'),280.5);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-5-1','yyyy/mm/dd'),190);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-5-1','yyyy/mm/dd'),113);

insert into sales values(seq_nbr.nextval,'david',to_date('2009-5-2','yyyy/mm/dd'),88);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-5-2','yyyy/mm/dd'),35.5);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-5-2','yyyy/mm/dd'),125);

insert into sales values(seq_nbr.nextval,'david',  to_date('2009-5-3','yyyy/mm/dd'),92);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-5-3','yyyy/mm/dd'),93);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-5-3','yyyy/mm/dd'),167);

insert into sales values(seq_nbr.nextval,'david',  to_date('2009-5-4','yyyy/mm/dd'),123.5);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-5-4','yyyy/mm/dd'),200);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-5-4','yyyy/mm/dd'),2);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-6-1','yyyy/mm/dd'),190);

insert into sales values(seq_nbr.nextval,'david',to_date('2009-6-1','yyyy/mm/dd'),110.5);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-6-1','yyyy/mm/dd'),213);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-10-1','yyyy/mm/dd'),1123);

insert into sales values(seq_nbr.nextval,'david',to_date('2009-10-1','yyyy/mm/dd'),780);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-10-1','yyyy/mm/dd'),310);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-10-2','yyyy/mm/dd'),139);

insert into sales values(seq_nbr.nextval,'david',to_date('2009-10-2','yyyy/mm/dd'),1110.5);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-10-2','yyyy/mm/dd'),998);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-10-3','yyyy/mm/dd'),120);

insert into sales values(seq_nbr.nextval,'mary',to_date('2009-10-4','yyyy/mm/dd'),10);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-10-4','yyyy/mm/dd'),234);

insert into sales values(seq_nbr.nextval,'david',to_date('2009-10-5','yyyy/mm/dd'),110.5);

insert into sales values(seq_nbr.nextval,'tom',to_date('2009-10-6','yyyy/mm/dd'),23);

insert into sales values(seq_nbr.nextval,'david',to_date('2009-10-7','yyyy/mm/dd'),10.5);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-2-1','yyyy/mm/dd'),30);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-1','yyyy/mm/dd'),73);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-1','yyyy/mm/dd'),110);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-2','yyyy/mm/dd'),190);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-2','yyyy/mm/dd'),30);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-2-2','yyyy/mm/dd'),92);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-3','yyyy/mm/dd'),130);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-2-3','yyyy/mm/dd'),90);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-3','yyyy/mm/dd'),110);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-4','yyyy/mm/dd'),70);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-2-4','yyyy/mm/dd'),9);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-5','yyyy/mm/dd'),88);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-5','yyyy/mm/dd'),70);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-2-13','yyyy/mm/dd'),50);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-13','yyyy/mm/dd'),170);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-14','yyyy/mm/dd'),270);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-15','yyyy/mm/dd'),67.5);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-5-1','yyyy/mm/dd'),280.5);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-5-1','yyyy/mm/dd'),190);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-5-1','yyyy/mm/dd'),113);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-5-2','yyyy/mm/dd'),88);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-5-2','yyyy/mm/dd'),35.5);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-5-2','yyyy/mm/dd'),125);

insert into sales values(seq_nbr.nextval,'王海',  to_date('2009-5-3','yyyy/mm/dd'),92);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-5-3','yyyy/mm/dd'),93);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-5-3','yyyy/mm/dd'),167);

insert into sales values(seq_nbr.nextval,'王海',  to_date('2009-5-4','yyyy/mm/dd'),123.5);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-5-4','yyyy/mm/dd'),200);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-5-4','yyyy/mm/dd'),2);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-6-1','yyyy/mm/dd'),190);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-6-1','yyyy/mm/dd'),110.5);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-6-1','yyyy/mm/dd'),213);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-10-1','yyyy/mm/dd'),1123);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-10-1','yyyy/mm/dd'),780);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-10-1','yyyy/mm/dd'),310);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-10-2','yyyy/mm/dd'),139);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-10-2','yyyy/mm/dd'),1110.5);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-10-2','yyyy/mm/dd'),998);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-10-3','yyyy/mm/dd'),120);

insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-10-4','yyyy/mm/dd'),10);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-10-4','yyyy/mm/dd'),234);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-10-5','yyyy/mm/dd'),110.5);

insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-10-6','yyyy/mm/dd'),23);

insert into sales values(seq_nbr.nextval,'王海',to_date('2009-10-7','yyyy/mm/dd'),10.5);

找出在各次促销活动中，销售量最高的销售员。

请编制一条SQL来完成这个查询。(尽量考虑多种写法)

解题思路

select p.promo_name,s.clerk_name,sum(s.sale_amount) top_sale

from promotions p inner join sales s

on s.sale_date between p.start_date and p.end_date

group by p.promo_name,s.clerk_name,p.start_date,p.end_date

having sum(s.sale_amount) >= all(

   select sum(s2.sale_amount)

   from sales s2

   where s.clerk_name <> s2.clerk_name and s2.sale_date between p.start_date and p.end_date

   group by s2.clerk_name

);

SELECT s1.clerk_name,p.promo_name,p.start_date,p.end_date,SUM(s1.sale_amount)

FROM sales s1

INNER JOIN promotions p

ON s1.sale_date BETWEEN p.start_date AND p.end_date

group by s1.clerk_name,p.promo_name,p.start_date,p.end_date

HAVING SUM(s1.sale_amount)>= ALL

(

	SELECT SUM(s2.sale_amount)

	FROM sales s2

	WHERE s2.sale_date BETWEEN p.start_date AND p.end_date

	GROUP BY s2.clerk_name

);

思考题五

财务咨询顾问的收入统计问题

金太阳财务咨询服务公司，聘请了一些财务顾问提供财务操作咨询服务，这些顾问都以兼职形式为公司服务，公司将按小时为顾问工作计算薪酬。

具体表信息如下：

a. 顾问信息表 (consultant)

create table consultant(

    cst_id int primary key,

    cst_name varchar2(30) not null

);

insert into consultant values(1, 'david');

insert into consultant values(2, 'henry');

insert into consultant values(3, 'mary');

insert into consultant values(4, 'kent');

b. 顾问费率表 (billings)

不同级别的顾问，在不同的时期，每小时的收费是不同的，公司会根据情况上调或者下调顾问的小时佣金待遇。

create table billings(

    cst_id int not null,

    bill_date date not null,

    bill_rate int not null,

    constraint PK_BILLING PRIMARY KEY(cst_id,bill_date),

    constraint FK_BILLING_EMP FOREIGN KEY (cst_id) references consultant(cst_id)

);

insert into billings values(1, to_date('2010-1-1' ,'yyyy/mm/dd'),50);

insert into billings values(2, to_date('2010-1-1' ,'yyyy/mm/dd'),60);

insert into billings values(3, to_date('2010-1-1' ,'yyyy/mm/dd'),70);

insert into billings values(4, to_date('2010-1-1' ,'yyyy/mm/dd'),40);

insert into billings values(1, to_date('2011-1-1' ,'yyyy/mm/dd'),60);

insert into billings values(4, to_date('2011-1-1' ,'yyyy/mm/dd'),45);

c. 顾问工作情况记录表 (hoursworked)

create table hoursworked(

	list_id int primary key,

	cst_id int not null,

	work_date date not null,

	bill_hrs  decimal(5,2) not null,

	constraint FK_HW_EMP FOREIGN KEY (cst_id) references consultant(cst_id)

);

insert into hoursworked values(1,1, to_date('2010-7-1','yyyy/mm/dd'),3);

insert into hoursworked values(2,1, to_date('2010-8-1','yyyy/mm/dd'),5);

insert into hoursworked values(3,2, to_date('2010-7-1','yyyy/mm/dd'),2);

insert into hoursworked values(4,1, to_date('2011-7-1','yyyy/mm/dd'),4);

insert into hoursworked values(5,3, to_date('2011-8-1','yyyy/mm/dd'),3.5);

insert into hoursworked values(6,4, to_date('2010-9-1','yyyy/mm/dd'),10);

insert into hoursworked values(7,4, to_date('2011-8-1','yyyy/mm/dd'),6);

求解：

我们需要你编写一个SQL查询语句，显示顾问的名字以及其总的顾问费用。

解题思路

select c.cst_id,e.cst_name,sum(d.bill_rate*c.bill_hrs) total_fee

from

(

    select h.cst_id,h.work_date,max(b.bill_date) bill_date, h.bill_hrs

    from billings b inner join hoursworked h

    on h.cst_id=b.cst_id and h.work_date>=b.bill_date

    group by h.cst_id,h.work_date,h.bill_hrs

)c,billings d,consultant e

where c.cst_id=d.cst_id and c.bill_date=d.bill_date and c.cst_id=e.cst_id

group by c.cst_id,e.cst_name

order by c.cst_id;

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