Delete Exam 3 (Take into consideration that there might be conflicts with foreign key constraints.)

-- Delete records from referencing tables first
DELETE FROM board_games
WHERE publisher_id IN (
    SELECT id
    FROM publishers
    WHERE address_id IN (
        SELECT id
        FROM addresses
        WHERE town LIKE 'L%'
    )
);

DELETE FROM publishers
WHERE address_id IN (
    SELECT id
    FROM addresses
    WHERE town LIKE 'L%'
);

-- Delete records from addresses table
DELETE FROM addresses
WHERE town LIKE 'L%';