4. select username, email, lives_in, items.name,
purchases.created_at, items.site from purchases, items, users
where item_id = items.id
and items.site = "themeforest.net"
and users.id = purchases.user_id
and purchases.created_at > DATE_ADD(NOW(), INTERVAL -1 MONTH)
and users.lives_in like "Melbourne%”