text: -- SELECT title,stock_quantity FROM books WHERE stock_quantity LIKE '____';
  -- SELECT title,stock_quantity FROM books WHERE stock_quantity LIKE '__';
  -- SELECT title,stock_quantity FROM books WHERE stock_quantity LIKE '___';
  -- SELECT title,stock_quantity FROM books WHERE stock_quantity LIKE '_';
  SELECT title FROM books WHERE title LIKE '%\%%';
  SELECT title FROM books WHERE title LIKE '%\_%';