39 lines
949 B
MySQL
39 lines
949 B
MySQL
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CREATE TABLE biographies (
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id SERIAL PRIMARY KEY,
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content TEXT NOT NULL
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);
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CREATE TABLE authors (
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id SERIAL PRIMARY KEY,
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name VARCHAR(100) NOT NULL,
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biography_id INT,
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FOREIGN KEY (biography_id) REFERENCES biographies(id)
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);
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CREATE TABLE books (
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ident SERIAL PRIMARY KEY,
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title VARCHAR(100) NOT NULL,
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author_id INT NOT NULL,
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FOREIGN KEY (author_id) REFERENCES authors(id) ON DELETE CASCADE
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);
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CREATE TABLE reviews (
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id SERIAL PRIMARY KEY,
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book_id INT NOT NULL,
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review TEXT NOT NULL,
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FOREIGN KEY (book_id) REFERENCES books(ident) ON DELETE CASCADE
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);
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CREATE TABLE genres (
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id SERIAL PRIMARY KEY,
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name VARCHAR(100) NOT NULL
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);
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CREATE TABLE book_genres (
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book_id INT NOT NULL,
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genre_id INT NOT NULL,
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PRIMARY KEY (book_id, genre_id),
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FOREIGN KEY (book_id) REFERENCES books(ident) ON DELETE CASCADE,
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FOREIGN KEY (genre_id) REFERENCES genres(id) ON DELETE CASCADE
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);
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