query: SELECT category ,  count(*) FROM book_club GROUP BY category
question: Showing all a book category and that a number book each a category.
query_toks: SELECT category , count ( * ) FROM book_club GROUP BY category
query_toks_no_value: select category , count ( * ) from book_club group by category
question_toks: Showing all a book category and that a number book each a category.