Hi all, I have some slow queries that I want to accelerate by utilizing information about sorting. My table definition: create table genomics.grch36 (site bigint, base char(1)); I use COPY INTO to populate the table. The source file size is 40GB and contains more than 3 billion rows. I can guarantee that the data in file is ordered by site. I query the data like this: sql>select base from genomics.grch36 where site between 10000 and 10010; +------+ | base | +======+ | N | | T | | A | | A | | C | | C | | C | | T | | A | | A | | C | +------+ 11 tuples (5m 23s) I think 5 minutes seem too much for this query. Primary key or an index on 'site' don't work or at least aren't recognized in query execution. I think MonetDB would benefit when knowing that the data is ordered by site. Wouldn't it? Because I know that the data is ordered by 'site', how can I tell MonetDB about this fact to speed up the query? Any suggestions? Regards, Sebastian