CREATE TABLE books (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    author TEXT,
    title TEXT,
    words INTEGER);
    
INSERT INTO books (author, title, words)
    VALUES ("J.K. Rowling", "Harry Potter and the Philosopher's Stone", 79944);
INSERT INTO books (author, title, words)
    VALUES ("J.K. Rowling", "Harry Potter and the Chamber of Secrets", 85141);
INSERT INTO books (author, title, words)
    VALUES ("J.K. Rowling", "Harry Potter and the Prisoner of Azkaban", 107253);
INSERT INTO books (author, title, words)
    VALUES ("J.K. Rowling", "Harry Potter and the Goblet of Fire", 190637);
INSERT INTO books (author, title, words)
    VALUES ("J.K. Rowling", "Harry Potter and the Order of the Phoenix", 257045);
INSERT INTO books (author, title, words)
    VALUES ("J.K. Rowling", "Harry Potter and the Half-Blood Prince", 168923);
INSERT INTO books (author, title, words)
    VALUES ("J.K. Rowling", "Harry Potter and the Deathly Hallows", 197651);

INSERT INTO books (author, title, words)
    VALUES ("Stephenie Meyer", "Twilight", 118501);
INSERT INTO books (author, title, words)
    VALUES ("Stephenie Meyer", "New Moon", 132807);
INSERT INTO books (author, title, words)
    VALUES ("Stephenie Meyer", "Eclipse", 147930);
INSERT INTO books (author, title, words)
    VALUES ("Stephenie Meyer", "Breaking Dawn", 192196);
    
INSERT INTO books (author, title, words)
    VALUES ("J.R.R. Tolkien", "The Hobbit", 95022);
INSERT INTO books (author, title, words)
    VALUES ("J.R.R. Tolkien", "Fellowship of the Ring", 177227);
INSERT INTO books (author, title, words)
    VALUES ("J.R.R. Tolkien", "Two Towers", 143436);
INSERT INTO books (author, title, words)
    VALUES ("J.R.R. Tolkien", "Return of the King", 134462);
 
SELECT author, SUM(words) AS total_words FROM books GROUP BY author 
HAVING total_words > 1000000;
SELECT author, AVG(words) AS avg_words FROM books GROUP BY author 
HAVING avg_words > 150000