> select when_stopped as when_happened, > 1 as order_hint > from transaction t > where '2005-10-25 15:00:00' <= when_stopped > and when_stopped <= '2005-10-26 10:00:00' > union all > select when_stopped as when_happened, > 2 as order_hint > from transaction t > where '2005-10-25 15:00:00' <= when_stopped > and when_stopped <= '2005-10-26 10:00:00' > order by when_happened, order_hint; hmm, try pushing the union into a subquery...this is better style because it's kind of ambiguous if the ordering will apply before/after the union. select q.when from ( select 1 as hint, start_time as when [...] union all select 2 as hint, end_time as when [...] ) q order by q.seq, when question: why do you want to flatten the table...is it not easier to work with as records? Merlin
