Without trying it out, how about something like:
select username, maxbid
from users u, (
select user_id, max(amount) as maxbid
from bids
group by user_id
where auction_id = XXX
) as b
where u.id = b.user_id;
John
Alan Bullock wrote:
hi all, I have the following schema:
CREATE TABLE auctions ( id serial NOT NULL, user_id int4, title
varchar(255), body varchar(255), CONSTRAINT auctions_pkey PRIMARY KEY (id) )
WITHOUT OIDS;
CREATE TABLE bids ( id serial NOT NULL, auction_id int4, user_id int4,
amount float8, created_at timestamp, CONSTRAINT bids_pkey PRIMARY KEY (id) )
WITHOUT OIDS;
CREATE TABLE users ( id serial NOT NULL, username varchar(255), CONSTRAINT
users_pkey PRIMARY KEY (id) ) WITHOUT OIDS;
I'd like to return all the bids for a given auction, but limit it to only
the *latest* bid from each user. so regardless of how many bids a user has
placed, only their latest is returned.
I dont have a clue where to even start with this and would appreciate some
pointers
thanks
alan
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