last 25 records from a dataset - Mailing list pgsql-novice

I am looking for the correct way to retrieve the last 25 records from a dataset without having to first retrieve the
entiredataset to pull out the last 25. 

The potential dataset can be very large... 10,000 records that match the query... yet I only can use the most recent
25.

my first idea is:

SELECT *
FROM table
WHERE thisField=thatValue etc...
ORDER BY table_id DESC
LIMIT 25

But I'm not confident in this and looking for a yeah or nay from a guru or two or three.

Thanks,
Brian