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Consider the following schema (keys are underlined): Product(pid, name, manufacture, price), Buys(cid, pid), Customer(cid, cname, gender) DA BA Write the following query in relational algebra and SQL (For relational algebra use pi for n, sigma for o, join for a, div for +, group by y) a) Find customer who bought any product that customer 1 has purchased. b) "Find the names of all customers who have purchased all products manufactured by XYZ." c) "Find. the names of all customers who have not purchased the most expensive product." d) Find the total price of purchased product by each customer. Make sure to include all customers, even those with no purchase. e) Find the similarity between each pair of customers. The similarity is the ratio between number of products that both customers bought and the sum of the total purchased products.

Consider the following schema (keys are underlined): Product(pid, name, manufacture, price), Buys(cid, pid), Customer(cid, cname, gender) DA BA Write the following query in relational algebra and SQL (For relational algebra use pi for n, sigma for o, join for a, div for +, group by y) a) Find customer who bought any product that customer 1 has purchased. b) "Find the names of all customers who have purchased all products manufactured by XYZ." c) "Find. the names of all customers who have not purchased the most expensive product." d) Find the total price of purchased product by each customer. Make sure to include all customers, even those with no purchase. e) Find the similarity between each pair of customers. The similarity is the ratio between number of products that both customers bought and the sum of the total purchased products.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Consider the following schema (keys are underlined): Product(pid, name, manufacture, price), Buys(cid, pid), Customer(cid, cname, gender) Write the following query in relational algebra and SQL (For relational algebra use pi for n, sigma for o, join for Da, div for +, group by y) a) Find customer who bought any product that customer 1 has purchased. b) "Find the names of all customers who have purchased all products manufactured by XYZ." c) "Find. the names of all customers who have not purchased the most expensive product." d) Find the total price of purchased product by each customer. Make sure to include all customers, even those with no purchase. e) Find the similarity between each pair of customers. The similarity is the ratio between number of products that both customers bought and the sum of the total purchased products. BA 0
Transcribed Image Text:Consider the following schema (keys are underlined): Product(pid, name, manufacture, price), Buys(cid, pid), Customer(cid, cname, gender) Write the following query in relational algebra and SQL (For relational algebra use pi for n, sigma for o, join for Da, div for +, group by y) a) Find customer who bought any product that customer 1 has purchased. b) "Find the names of all customers who have purchased all products manufactured by XYZ." c) "Find. the names of all customers who have not purchased the most expensive product." d) Find the total price of purchased product by each customer. Make sure to include all customers, even those with no purchase. e) Find the similarity between each pair of customers. The similarity is the ratio between number of products that both customers bought and the sum of the total purchased products. BA 0
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