A table (chemistry) has columns named site_id, sample_date, param, quant, and str_name (among other columns). I want to find the site_id, sample_date, and quant for a specific str_name and param. I cannot get the proper syntax in the SELECT statement. My attempts are variations of, SELECT max(quant), param, site_id, sample_date, str_name from chemistry WHERE param = 'TDS' AND str_name = 'BurrowCrk'; which prompts postgres to tell me, ERROR: column "chemistry.param" must appear in the GROUP BY clause or be used in an aggregate function I suspect that retrieving these data requires nested SELECT statements, and I'd appreciate learning how to retrive such data. Rich -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
