I've read some on table partitioning and using nested select statements with group by, but have not found the syntax to produce the needed results.
From a table I extract row counts grouped by three columns: select stream, sampdate, func_feed_grp, count(*) from benthos group by stream, sampdate, func_feed_grp order by stream, sampdate, func_feed_group; And I want to include the proportion of each count based on the total rows for each stream and sampdate. The totals are obtained with this statement: select stream, sampdate, count(*) as tot_cnt from benthos group by stream, sampdate order by stream, sampdate; What I do not know how to do is combine the two so the resulting table contains the columns stream, sampdate, count, proportion. I want to learn how to build the sub-select to get this result. Joe Celko's 'SQL for Smarties, 4th Ed.' has a close example in the chapter on table partitioning, but I could not apply that model to my table. TIA, Rich -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
