-- John
Kelley Lingerfelt wrote:
Make sure stamps.item_id and links.item_id are indexed, I had a similar problem, and when I indexed the columns, it went down to less than a half second.
KL
John Almberg wrote:
I am trying to find records (from the 'stamps' table) that are NOT related to records in the 'links' table. To do this, I'm using a left join. For example:
select s.*, l.item_id as lid from stamps as s left join links as l on (( s.item_id=l.item_id)) WHERE (s.sold is null);
This worked great when there were just a few records in each table, but now that there are about 4000 records in each table, this simple query has slowed down to a crawl. It currently takes about 2 minutes to execute on a linux machine. Not good enough, especially since there will ultimately be at least 10,000 records in each table.
Is there a better technique for doing this kind of search? Any suggestions much appreciated.
Brgds: John
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