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。

  1. -- 商店促销时间的日历
  2. create table promotions (
  3. 	promo_name varchar2(50) not null primary key,  -- 促销活动名称
  4. 	start_date date not null,                      -- 开始时间
  5. 	end_date date not null,                        -- 终止时间
  6. 	check(start_date<=end_date)
  7. );
  9. -- 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）
  10. create table sales
  11. (
  12. 	ticket_nbr int not null primary key,  --销售票据编号 （自增）
  13. 	clerk_name varchar2(20) not null,     --销售员姓名
  14. 	sale_date date not null,              --销售日期
  15. 	sale_amount number(9,2) not null      --销售金额
  16. );
  18. insert into promotions values('spring sales',to_date('2009-2-1','yyyy/mm/dd'),to_date('2009-2-15','yyyy/mm/dd'));
  19. insert into promotions values('worker sale',to_date('2009-5-1','yyyy/mm/dd'),to_date('2009-5-4','yyyy/mm/dd'));
  20. insert into promotions values('children sale',to_date('2009-6-1','yyyy/mm/dd'),to_date('2009-6-1','yyyy/mm/dd'));
  21. insert into promotions values('national day sale',to_date('2009-10-1','yyyy/mm/dd'),to_date('2009-10-7','yyyy/mm/dd'));
  23. create sequence seq_nbr;
  25. insert into sales values(seq_nbr.nextval,'david',to_date('2009-2-1','yyyy/mm/dd'),30);
  26. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-1','yyyy/mm/dd'),73);
  27. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-1','yyyy/mm/dd'),110);
  28. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-2','yyyy/mm/dd'),190);
  29. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-2','yyyy/mm/dd'),30);
  30. insert into sales values(seq_nbr.nextval,'david',to_date('2009-2-2','yyyy/mm/dd'),92);
  31. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-3','yyyy/mm/dd'),130);
  32. insert into sales values(seq_nbr.nextval,'david',to_date('2009-2-3','yyyy/mm/dd'),90);
  33. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-3','yyyy/mm/dd'),110);
  34. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-4','yyyy/mm/dd'),70);
  35. insert into sales values(seq_nbr.nextval,'david',to_date('2009-2-4','yyyy/mm/dd'),9);
  36. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-5','yyyy/mm/dd'),88);
  37. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-5','yyyy/mm/dd'),70);
  38. insert into sales values(seq_nbr.nextval,'david',to_date('2009-2-13','yyyy/mm/dd'),50);
  39. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-13','yyyy/mm/dd'),170);
  40. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-2-14','yyyy/mm/dd'),270);
  41. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-2-15','yyyy/mm/dd'),67.5);
  42. insert into sales values(seq_nbr.nextval,'david',to_date('2009-5-1','yyyy/mm/dd'),280.5);
  43. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-5-1','yyyy/mm/dd'),190);
  44. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-5-1','yyyy/mm/dd'),113);
  45. insert into sales values(seq_nbr.nextval,'david',to_date('2009-5-2','yyyy/mm/dd'),88);
  46. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-5-2','yyyy/mm/dd'),35.5);
  47. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-5-2','yyyy/mm/dd'),125);
  48. insert into sales values(seq_nbr.nextval,'david',  to_date('2009-5-3','yyyy/mm/dd'),92);
  49. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-5-3','yyyy/mm/dd'),93);
  50. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-5-3','yyyy/mm/dd'),167);
  51. insert into sales values(seq_nbr.nextval,'david',  to_date('2009-5-4','yyyy/mm/dd'),123.5);
  52. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-5-4','yyyy/mm/dd'),200);
  53. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-5-4','yyyy/mm/dd'),2);
  54. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-6-1','yyyy/mm/dd'),190);
  55. insert into sales values(seq_nbr.nextval,'david',to_date('2009-6-1','yyyy/mm/dd'),110.5);
  56. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-6-1','yyyy/mm/dd'),213);
  57. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-10-1','yyyy/mm/dd'),1123);
  58. insert into sales values(seq_nbr.nextval,'david',to_date('2009-10-1','yyyy/mm/dd'),780);
  59. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-10-1','yyyy/mm/dd'),310);
  60. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-10-2','yyyy/mm/dd'),139);
  61. insert into sales values(seq_nbr.nextval,'david',to_date('2009-10-2','yyyy/mm/dd'),1110.5);
  62. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-10-2','yyyy/mm/dd'),998);
  63. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-10-3','yyyy/mm/dd'),120);
  64. insert into sales values(seq_nbr.nextval,'mary',to_date('2009-10-4','yyyy/mm/dd'),10);
  65. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-10-4','yyyy/mm/dd'),234);
  66. insert into sales values(seq_nbr.nextval,'david',to_date('2009-10-5','yyyy/mm/dd'),110.5);
  67. insert into sales values(seq_nbr.nextval,'tom',to_date('2009-10-6','yyyy/mm/dd'),23);
  68. insert into sales values(seq_nbr.nextval,'david',to_date('2009-10-7','yyyy/mm/dd'),10.5);
  69. insert into sales values(seq_nbr.nextval,'王海',to_date('2009-2-1','yyyy/mm/dd'),30);
  70. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-1','yyyy/mm/dd'),73);
  71. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-1','yyyy/mm/dd'),110);
  72. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-2','yyyy/mm/dd'),190);
  73. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-2','yyyy/mm/dd'),30);
  74. insert into sales values(seq_nbr.nextval,'王海',to_date('2009-2-2','yyyy/mm/dd'),92);
  75. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-3','yyyy/mm/dd'),130);
  76. insert into sales values(seq_nbr.nextval,'王海',to_date('2009-2-3','yyyy/mm/dd'),90);
  77. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-3','yyyy/mm/dd'),110);
  78. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-4','yyyy/mm/dd'),70);
  79. insert into sales values(seq_nbr.nextval,'王海',to_date('2009-2-4','yyyy/mm/dd'),9);
  80. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-5','yyyy/mm/dd'),88);
  81. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-5','yyyy/mm/dd'),70);
  82. insert into sales values(seq_nbr.nextval,'王海',to_date('2009-2-13','yyyy/mm/dd'),50);
  83. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-13','yyyy/mm/dd'),170);
  84. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-2-14','yyyy/mm/dd'),270);
  85. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-2-15','yyyy/mm/dd'),67.5);
  86. insert into sales values(seq_nbr.nextval,'王海',to_date('2009-5-1','yyyy/mm/dd'),280.5);
  87. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-5-1','yyyy/mm/dd'),190);
  88. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-5-1','yyyy/mm/dd'),113);
  89. insert into sales values(seq_nbr.nextval,'王海',to_date('2009-5-2','yyyy/mm/dd'),88);
  90. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-5-2','yyyy/mm/dd'),35.5);
  91. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-5-2','yyyy/mm/dd'),125);
  92. insert into sales values(seq_nbr.nextval,'王海',  to_date('2009-5-3','yyyy/mm/dd'),92);
  93. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-5-3','yyyy/mm/dd'),93);
  94. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-5-3','yyyy/mm/dd'),167);
  95. insert into sales values(seq_nbr.nextval,'王海',  to_date('2009-5-4','yyyy/mm/dd'),123.5);
  96. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-5-4','yyyy/mm/dd'),200);
  97. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-5-4','yyyy/mm/dd'),2);
  98. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-6-1','yyyy/mm/dd'),190);
  99. insert into sales values(seq_nbr.nextval,'王海',to_date('2009-6-1','yyyy/mm/dd'),110.5);
  100. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-6-1','yyyy/mm/dd'),213);
  101. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-10-1','yyyy/mm/dd'),1123);
  102. insert into sales values(seq_nbr.nextval,'王海',to_date('2009-10-1','yyyy/mm/dd'),780);
  103. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-10-1','yyyy/mm/dd'),310);
  104. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-10-2','yyyy/mm/dd'),139);
  105. insert into sales values(seq_nbr.nextval,'王海',to_date('2009-10-2','yyyy/mm/dd'),1110.5);
  106. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-10-2','yyyy/mm/dd'),998);
  107. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-10-3','yyyy/mm/dd'),120);
  108. insert into sales values(seq_nbr.nextval,'高春梅',to_date('2009-10-4','yyyy/mm/dd'),10);
  109. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-10-4','yyyy/mm/dd'),234);
  110. insert into sales values(seq_nbr.nextval,'王海',to_date('2009-10-5','yyyy/mm/dd'),110.5);
  111. insert into sales values(seq_nbr.nextval,'刘万理',to_date('2009-10-6','yyyy/mm/dd'),23);
  112. 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

  1. select p.promo_name,s.clerk_name,sum(s.sale_amount) top_sale
  2. from promotions p inner join sales s
  3. on s.sale_date between p.start_date and p.end_date
  4. group by p.promo_name,s.clerk_name,p.start_date,p.end_date
  5. having sum(s.sale_amount) >= all(
  6.    select sum(s2.sale_amount)
  7.    from sales s2
  8.    where s.clerk_name <> s2.clerk_name and s2.sale_date between p.start_date and p.end_date
  9.    group by s2.clerk_name
  10. );
  12. SELECT s1.clerk_name,p.promo_name,p.start_date,p.end_date,SUM(s1.sale_amount)
  13. FROM sales s1
  14. INNER JOIN promotions p
  15. ON s1.sale_date BETWEEN p.start_date AND p.end_date
  16. group by s1.clerk_name,p.promo_name,p.start_date,p.end_date
  17. HAVING SUM(s1.sale_amount)>= ALL
  18. (
  19. 	SELECT SUM(s2.sale_amount)
  20. 	FROM sales s2
  21. 	WHERE s2.sale_date BETWEEN p.start_date AND p.end_date
  22. 	GROUP BY s2.clerk_name
  23. );

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)

  1. create table consultant(
  2.     cst_id int primary key,
  3.     cst_name varchar2(30) not null
  4. );
  5. insert into consultant values(1, 'david');
  6. insert into consultant values(2, 'henry');
  7. insert into consultant values(3, 'mary');
  8. 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。

  1. create table billings(
  2.     cst_id int not null,
  3.     bill_date date not null,
  4.     bill_rate int not null,
  5.     constraint PK_BILLING PRIMARY KEY(cst_id,bill_date),
  6.     constraint FK_BILLING_EMP FOREIGN KEY (cst_id) references consultant(cst_id)
  7. );
  8. insert into billings values(1, to_date('2010-1-1' ,'yyyy/mm/dd'),50);
  9. insert into billings values(2, to_date('2010-1-1' ,'yyyy/mm/dd'),60);
  10. insert into billings values(3, to_date('2010-1-1' ,'yyyy/mm/dd'),70);
  11. insert into billings values(4, to_date('2010-1-1' ,'yyyy/mm/dd'),40);
  12. insert into billings values(1, to_date('2011-1-1' ,'yyyy/mm/dd'),60);
  13. 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)

  1. create table hoursworked(
  2. 	list_id int primary key,
  3. 	cst_id int not null,
  4. 	work_date date not null,
  5. 	bill_hrs  decimal(5,2) not null,
  6. 	constraint FK_HW_EMP FOREIGN KEY (cst_id) references consultant(cst_id)
  7. );
  8. insert into hoursworked values(1,1, to_date('2010-7-1','yyyy/mm/dd'),3);
  9. insert into hoursworked values(2,1, to_date('2010-8-1','yyyy/mm/dd'),5);
  10. insert into hoursworked values(3,2, to_date('2010-7-1','yyyy/mm/dd'),2);
  11. insert into hoursworked values(4,1, to_date('2011-7-1','yyyy/mm/dd'),4);
  12. insert into hoursworked values(5,3, to_date('2011-8-1','yyyy/mm/dd'),3.5);
  13. insert into hoursworked values(6,4, to_date('2010-9-1','yyyy/mm/dd'),10);
  14. 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

  1. select c.cst_id,e.cst_name,sum(d.bill_rate*c.bill_hrs) total_fee
  2. from
  3. (
  4.     select h.cst_id,h.work_date,max(b.bill_date) bill_date, h.bill_hrs
  5.     from billings b inner join hoursworked h
  6.     on h.cst_id=b.cst_id and h.work_date>=b.bill_date
  7.     group by h.cst_id,h.work_date,h.bill_hrs
  8. )c,billings d,consultant e
  9. where c.cst_id=d.cst_id and c.bill_date=d.bill_date and c.cst_id=e.cst_id
  10. group by c.cst_id,e.cst_name
  11. order by c.cst_id;

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