text: -- Your SQL goes here
  
  CREATE TABLE nissaya_book_maps (
      id           SERIAL PRIMARY KEY,
  
      nsy_book_id     VARCHAR (64) NOT NULL, 
      book_id    INTEGER NOT NULL, 
      vol    INTEGER NOT NULL, 
  
      title        VARCHAR (64) NOT NULL,
      type          VARCHAR (16) NOT NULL,
  
      created_at  TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
  );
  
  
  CREATE INDEX nissaya_book_maps_nsy_book_id ON nissaya_book_maps (nsy_book_id);
  