Decode help in SQL function

Question

Hi,
I'm writing an HTMLDB application that we will be using to track the number of hours that we put into a project (all projects), and I've got a routine that returns the number of hours that are possible within a given month M-F 8 hours a day. I use this value returned to indicate how many hours have been enterered.
SELECT null link, 'Still Unrecorded' itsrdescr,trueworkdays(:P80_START,:P80_END)*8-(select sum(hoursworked) ihoursworked from workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END) hoursworked
from dual
UNION
SELECT null link, wd.itsrdescr,sum(b.hoursworked) hoursworked
FROM workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END
GROUP by wd.itsrdescr
ORDER by hoursworked desc
What I'm wanting is something along the lines of this:
SELECT null link, 'Still Unrecorded' itsrdescr,decode((trueworkdays(:P80_START,:P80_END)*8-(select sum(hoursworked) ihoursworked from workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END)),<0,0,?????????) hoursworked
from dual
UNION
SELECT null link, wd.itsrdescr,sum(b.hoursworked) hoursworked
FROM workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END
GROUP by wd.itsrdescr
ORDER by hoursworked desc
which will include a decode statement to let me know when the value getting returned into hoursworked on that first column is less than zero which throws off the chart. In this particular case, it has a value of -6 which makes all my percentages go haywire. How would one code this statement to include a decode statement to find out if that sum is returning a negative number?
Hope this made sense,
TIA,
cliff

Answer 1

Hey Tyler,
Actually.... It kinda killed the server. I'm trying to figure out a way to get the following functionality in a different way. Here is the way that the query turned out using the case statement.
SELECT null link, '<b><font color="red">Still Unrecorded</font></b>' itsrdescr,
(case
when (trueworkdays(:P80_START,:P80_END)*8-(select sum(hoursworked) ihoursworked from workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END)) < 0 then 0
else
(trueworkdays(:P80_START,:P80_END)*8-(select sum(hoursworked) ihoursworked from workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END))
end) hoursworked
from dual
UNION
SELECT null link, wd.itsrdescr,sum(b.hoursworked) hoursworked
FROM workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END
GROUP by wd.itsrdescr
ORDER by hoursworked desc
Any tips on what I could do to get the above functionality without killing my server.
Thx for the input
cliff