UPDATE FROM code
UPDATE users u SET hobby = (SELECT hobby FROM hobbies h WHERE u.id = h.user_id);
UPDATE users u SET hobby = h.hobby FROM hobbies h WHERE u.id = h.user_id;
UPDATE users u SET hobby = (SELECT hobby FROM hobbies h WHERE u.id = h.user_id);
UPDATE users u SET hobby = h.hobby FROM hobbies h WHERE u.id = h.user_id;