Date: Wed, 12 Mar 2008 12:09:54 -0500
I have learned a lot about sql this morning but I can't quite close the gap between what I am reading and what I need to do. I know the following query can be written far more efficiently:
select pstart.periodID, ps1.projectNumber, ps1.statusID, ps1.changeDate
from vw_project_status_period ps1,
where pstart.periodid >= ps1.periodid and
pstop.endDate = ( select max( p.endDate )
whereps2.projectnumber = ps1.projectNumber and
ps2.periodid = p.periodid and p.endDate <= pstart.endDate
pstop.periodid = ps1.periodid;
vw_project_status_period contains info on when a projects status changes. The above query fills in period gaps between changes for each project. I am having trouble figuring out how to 'fill in the gaps' of periods between the change dates. After that it is just a matter of using last_value.
I have been looking at this for a few hours and figured I'd throw another sql question to the list.
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