Designing a Database Schema for a Library System

Problem

Design a database schema for a library system that keeps track of books, patrons, and checkouts. The system should allow patrons to check out multiple books at a time, and should keep track of when books are due back.
Example input:
Patron A checks out Book 1 and Book 2 on January 1.
Example output:
Patron A has two books checked out:
Book 1 - due January 15
Book 2 - due January 15

Solution

This solution is in SQL. Our A.I. can create solutions in multiple languages.

sarastevens

/*

Solution:

CREATE TABLE books (
  id INTEGER PRIMARY KEY,
  title VARCHAR(255) NOT NULL,
  author VARCHAR(255) NOT NULL,
  isbn VARCHAR(255) NOT NULL
);

CREATE TABLE patrons (
  id INTEGER PRIMARY KEY,
  name VARCHAR(255) NOT NULL,
  email VARCHAR(255) NOT NULL
);

CREATE TABLE checkouts (
  id INTEGER PRIMARY KEY,
  book_id INTEGER NOT NULL,
  patron_id INTEGER NOT NULL,
  due_date DATE NOT NULL,
  FOREIGN KEY (book_id) REFERENCES books(id),
  FOREIGN KEY (patron_id) REFERENCES patrons(id)
);

This solution is optimal because it allows for multiple books to be checked out by a single patron, and it allows for multiple patrons to check out the same book.

*/