مولّد مخطط الكيانات من SQL

CREATE TABLE authors (
  id INTEGER PRIMARY KEY,
  name TEXT NOT NULL
);

CREATE TABLE books (
  id INTEGER PRIMARY KEY,
  title TEXT NOT NULL,
  author_id INTEGER NOT NULL REFERENCES authors(id)
);

CREATE TABLE reviews (
  id INTEGER PRIMARY KEY,
  book_id INTEGER NOT NULL REFERENCES books(id),
  rating INTEGER NOT NULL
);