postgresql7.1 select to_char(start_date, 'J') as start_date, coalesce(e.name, a.name) as name, coalesce(e.description, a.description) as description, e.event_id as item_id from acs_activities a, acs_events e, timespans s, time_intervals t where e.timespan_id = s.timespan_id and s.interval_id = t.interval_id and e.activity_id = a.activity_id and e.event_id in ( select cal_item_id from cal_items where on_which_calendar = :calendar_id ) select to_char(start_date, 'J') as start_date, coalesce(e.name, a.name) as name, coalesce(e.description, a.description) as description, e.event_id as item_id from acs_activities a, acs_events e, timespans s, time_intervals t where e.timespan_id = s.timespan_id and s.interval_id = t.interval_id and e.activity_id = a.activity_id and e.event_id in ( select cal_item_id from cal_items where on_which_calendar = :calendar_id )