Hi group, I have the following table with millions of rows CREATE TABLE table1 ( col1 text, col1 text, doc text ) select col1 from table1 group by col1 limit 2; select distinct on (col1) col1 from table1 limit 2; -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance