ok, so my problem is this
I have an auction website that supports autolisting, however what happens is when the auction gets autolisted it does not clean the old entries, so i was going to write some php code and run it as an cronjob to clear the entries say after 2 days or so, the tables being referenced are probid_auctions & probid_auction_media and the column is auction_id, I would like to take the column auction_id in probid_auction_media and compare it with the column auction_id in probid_auctions and delete any entries in probid_auction_media that did not match
testing this now
mysql_connect($host, $username, $password);
mysql_select_db("b1396hos_database1") or die( "Unable to select database");
$db->query("DELETE * FROM probid_auction_media
WHERE auction_id NOT IN (SELECT DISTINCT auction_id FROM probid_auctions");
DELETE FROM probid_auction_media
WHERE auction_id NOT IN (SELECT DISTINCT auction_id FROM probid_auctions);
Use query like this
DELETE
FROM probid_auction_media
WHERE auction_id NOT IN(SELECT
probid_auction_media.auction_id
FROM probid_auctions,
probid_auction_media
where probid_auctions.auction_id != probid_auction_media.auction_id);
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