On 3/21/06, Addison, Mark <[EMAIL PROTECTED]> wrote: > > > -----Original Message----- > > From: Gregory Machin [mailto:[EMAIL PROTECTED] > > Sent: 21 March 2006 11:28 > > To: mysql@lists.mysql.com > > Subject: mysql query and version problem .... Help! > > > > Hi. > > > > I have just found out that my hosting provider is using mysql > > 4 and I'm > > using mysql 5 the one query I need wont work and is a key > > feature in the > > application .. here is the query i'm using > > > > SELECT dealer_id, auto_id, bid_amount FROM bids b1 WHERE > > bid_amount=(SELECT > > MAX(b2.bid_amount) > > FROM bids b2 WHERE b1.auto_id = b2.auto_id) AND > > auto_dealer_id = '3' AND > > Bid_Status = '1'; > > > > How do I get this to work on version 4 ? > > You could create a tmp table with the max bids and then join on > that. Something like: > > CREATE TEMPORARY TABLE max_bids > SELECT auto_id, MAX(bid_amount) AS max_bid_amount > FROM bids > GROUP BY auto_id; > SELECT dealer_id, b1.auto_id, bid_amount FROM bids b1, max_bids b2 > WHERE b1.auto_id = b2.auto_id > AND bid_amount=max_bid_amount > AND auto_dealer_id = '3' AND Bid_Status = '1'; > > mark > --
I thought about that but I'm worried about the users getting the rite data if multiple users make the same requests at the same time ... i supose the easiest would be to name the temp tables after the user making the request ??
