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Question: (MySQL Syntax) Write a single UPDATE statement to change the due date for all books borrowed on same day as the borrowing patron's sign-up. These due dates should be changed to exactly 30 days after patron sign-up.   Here are the tables: CREATE TABLE book( isbn VARCHAR(100) PRIMARY KEY, title VARCHAR(100) NOT NULL, author VARCHAR(100) NOT NULL, pub_date DATE ); CREATE TABLE patron( id INT PRIMARY KEY, first_name VARCHAR(100) NOT NULL, last_name VARCHAR(100) NOT NULL, sign_up DATE NOT NULL ); CREATE TABLE borrow( patron INT NOT NULL, book VARCHAR(100) NOT NULL, check_out_date DATE NOT NULL, due_date DATE NOT NULL, PRIMARY KEY(patron, book, check_out_date), FOREIGN KEY (patron) REFERENCES patron(id), FOREIGN KEY (book) REFERENCES book(isbn) ); CREATE TABLE late_notice( patron INT NOT NULL, book VARCHAR(100) NOT NULL, check_out_date DATE NOT NULL, notice_date DATE, FOREIGN KEY (patron, book, check_out_date) REFERENCES borrow(patron, book, check_out_date) );

Question: (MySQL Syntax) Write a single UPDATE statement to change the due date for all books borrowed on same day as the borrowing patron's sign-up. These due dates should be changed to exactly 30 days after patron sign-up.   Here are the tables: CREATE TABLE book( isbn VARCHAR(100) PRIMARY KEY, title VARCHAR(100) NOT NULL, author VARCHAR(100) NOT NULL, pub_date DATE ); CREATE TABLE patron( id INT PRIMARY KEY, first_name VARCHAR(100) NOT NULL, last_name VARCHAR(100) NOT NULL, sign_up DATE NOT NULL ); CREATE TABLE borrow( patron INT NOT NULL, book VARCHAR(100) NOT NULL, check_out_date DATE NOT NULL, due_date DATE NOT NULL, PRIMARY KEY(patron, book, check_out_date), FOREIGN KEY (patron) REFERENCES patron(id), FOREIGN KEY (book) REFERENCES book(isbn) ); CREATE TABLE late_notice( patron INT NOT NULL, book VARCHAR(100) NOT NULL, check_out_date DATE NOT NULL, notice_date DATE, FOREIGN KEY (patron, book, check_out_date) REFERENCES borrow(patron, book, check_out_date) );

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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Question: (MySQL Syntax)

Write a single UPDATE statement to change the due date for all books borrowed on same day as the borrowing patron's sign-up. These due dates should be changed to exactly 30 days after patron sign-up.

 

Here are the tables:

CREATE TABLE book(
isbn VARCHAR(100) PRIMARY KEY,
title VARCHAR(100) NOT NULL,
author VARCHAR(100) NOT NULL,
pub_date DATE
);

CREATE TABLE patron(
id INT PRIMARY KEY,
first_name VARCHAR(100) NOT NULL,
last_name VARCHAR(100) NOT NULL,
sign_up DATE NOT NULL
);

CREATE TABLE borrow(
patron INT NOT NULL,
book VARCHAR(100) NOT NULL,
check_out_date DATE NOT NULL,
due_date DATE NOT NULL,
PRIMARY KEY(patron, book, check_out_date),
FOREIGN KEY (patron) REFERENCES patron(id),
FOREIGN KEY (book) REFERENCES book(isbn)
);

CREATE TABLE late_notice(
patron INT NOT NULL,
book VARCHAR(100) NOT NULL,
check_out_date DATE NOT NULL,
notice_date DATE,
FOREIGN KEY (patron, book, check_out_date) REFERENCES borrow(patron, book, check_out_date)
);

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This update statement is failing a test case. Any ideas on how to fix this?

 

Test Case 3 or more borrow rows on date of patron sign up After update date check Other records unaffected Expected Actual Yes Yes 0 Yes 2 Yes SQL Statement (hidden) SELECT count(*) FROM borrow b JOIN patron p ON b.patron = p.id WHERE check_out_date= sign_up AND due_date <> DATE_ADD (sign_up, INTERVAL 30 DAY) SELECT CASE WHEN count (*) > 0 THEN 'Yes' ELSE 'No' END FROM borrow b JOIN patron p ON b.patron = p.id WHERE due date <> DATE_ADD (check_out_date, INTERVAL 30 DAY)
Transcribed Image Text:Test Case 3 or more borrow rows on date of patron sign up After update date check Other records unaffected Expected Actual Yes Yes 0 Yes 2 Yes SQL Statement (hidden) SELECT count(*) FROM borrow b JOIN patron p ON b.patron = p.id WHERE check_out_date= sign_up AND due_date <> DATE_ADD (sign_up, INTERVAL 30 DAY) SELECT CASE WHEN count (*) > 0 THEN 'Yes' ELSE 'No' END FROM borrow b JOIN patron p ON b.patron = p.id WHERE due date <> DATE_ADD (check_out_date, INTERVAL 30 DAY)
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