DELETE FROM players WHERE level < 50 AND lastlogin < UNIX_TIMESTAMP() - 7*24*60*60;
DELETE
FROM accounts
WHERE id NOT
IN (
SELECT account_id
FROM players
);
UPDATE `houses` SET owner =0 WHERE owner >0 AND owner NOT IN (
SELECT id
FROM players
);
DELETE FROM players WHERE level < [COLOR="Blue"][B]50[/B][/COLOR] AND lastlogin < UNIX_TIMESTAMP() - [COLOR="Red"][B]7[/B][/COLOR]*24*60*60;