-- Create a database named Bookstore

CREATE DATABASE Bookstore;

-- Create a table of the Publishers

CREATE TABLE PUBLISHERS_18(

publisher VARCHAR(255) PRIMARY KEY,

address VARCHAR(255) DEFAULT 'UNKNOWN',

phone VARCHAR(255) DEFAULT 'UNKNOWN',

country VARCHAR(255) DEFAULT 'UNKNOWN'

);

-- Create a table of the Books

CREATE TABLE BOOKS_18 (

isbn VARCHAR(10) PRIMARY KEY,

title VARCHAR(200) NOT NULL,

publisher VARCHAR(255) NOT NULL,

publication_year INT NOT NULL,

price NUMERIC(10,2) DEFAULT 0.00,

FOREIGN KEY (publisher) REFERENCES PUBLISHERS_18(publisher)

ON UPDATE CASCADE

ON DELETE CASCADE

);

-- Create a table of the authors

CREATE TABLE AUTHORS_18 (

id VARCHAR(20) PRIMARY KEY,

name VARCHAR(255) NOT NULL,

role VARCHAR(255),

gender VARCHAR(255) DEFAULT 'UNKNOWN',

nationality VARCHAR(255) DEFAULT 'UKNOWN'

);

-- Create joint table for books and authors

CREATE TABLE BOOKS_AUTHORS_18 (

isbn VARCHAR(10) REFERENCES BOOKS_18(isbn),

id VARCHAR(20) REFERENCES AUTHORS_18(id),

PRIMARY KEY (isbn, id)

);

-- Create a table of the reviews

CREATE TABLE REVIEWS_18(

review_id VARCHAR(255) PRIMARY KEY,

isbn VARCHAR(10),

nickname VARCHAR(255) DEFAULT 'USER',

ratings INT ,

timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,

review TEXT DEFAULT 'not available',

FOREIGN KEY (isbn) REFERENCES BOOKS_18(isbn)

ON UPDATE CASCADE

ON DELETE CASCADE

);