help create query against two tables

stepdefinition has
steptype
flowid
stepid

task has
taskid
flowid
stepid

flowid and stepid for both tables match; meaning that if i found a record in task with a certain taskid, i could query stepdefinition with the same flowid and stepid to find the steptype.

well, i wanna do it the other way around. I query stepdefinition to find a list of flowids and stepids for a specific steptype.

select flowid, stepid from stepdefinition where steptype = -3

Now, I want to find all taskids in task for each flowid/stepid combination

here's a visual

http://www.filecabin.com/up1/1144249279-task.gifselect taskid from task
where stepID+flowID in
(select stepID+flowID from stepdefinition where steptype = -3)
order by taskid

works|||select t.taskid, t.stepID, t.flowID
from task as t
join stepdefinition as s
on ( t.stepID = s.stepID
and t.flowID = s.flowID )
where s.steptype = -3