postgresql7.1 insert into adv_user_map (user_id, adv_key, event_time, event_type) values (:user_id, :adv_key, current_timestamp, 'c') update adv_log set click_count = click_count + 1 where adv_key = :adv_key and entry_date = current_date insert into adv_log (adv_key, entry_date, click_count) values (:adv_key, current_date, (select 1 from dual where 0 = (select count (*) from adv_log where adv_key = :adv_key and entry_date = current_date)))" db_dml adv_insert $insert_sql