On Sun, Jun 6, 2010 at 6:02 AM, Torsten Zühlsdorff <foo@xxxxxxxxxxxxxxxxxxx> wrote: > Scott Marlowe schrieb: > Thank you very much for your example. Now i've got it :) > > I've test your example on a small set of my rows. While testing i've > stumpled over a difference in sql-formulation. Using except seems to be a > little slower than the more complex where not in (subquery) group by. Here > is my example: Yeah, to get a good idea you need a more realistic example. Build some tables with millions of rows using generate_series() and then test against those. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
