Stacked bar/null data bug.

Question

Hi All,
Despite a number of posts reporting this bug in previous releases of Apex I am facing a simmilar issue as people before me...
I am trying to generate a stacked bar graph for a given period of time. To make my point clear let me provide an example:
1. I have a "project" table with info such as project_due_date and project_complete_date....
2. Now lets say I have 2 projects which were completed in JAN, and 3 projects which were completed in MAR (no projects were done in FEB)
3. Now the following SQL:
SELECT null LINK,
to_char(project_due_date,'MONTH') Month,
count(*) Late
FROM dm_project
-- Check for projects within due date (SLA)
WHERE project_complete_date < project_due_date
-- Group them by every month
GROUP BY to_char(project_due_date,'MONTH')
Will give me something like:
LINK MONTH LATE
- JANUARY 2
- MARCH 3
This will generate a graph which will display the number of projects that where completed within given time (< project_due_date).
BUT !
The above will only show 2 bars with January and March as X-Axis Labels... Obviously this is not a very representative way of displaying data.
Now, as a workaround I would like to build my queary so that it would return something like:
LINK MONTH LATE
- JANUARY 2
- FEBRUARY 0
- MARCH 3
- APRIL 0
-...etc...
- DECEMBER 0
So my question is finally this:
Is there anyway to get the months of the given year in SQL which I could use as my label value of the graph?
Kind regards,
Pawel.

Answer 1

Unfortunatelly... the above two queries still don't appear on the graph. This is very surprising to me as both statements return correct (I think) output:
Query 1
======
SELECT NULL AS link,
TO_CHAR ( TRUNC ( c.day, 'MONTH' ), 'MONTH' ) AS period,
COUNT(p.project_complete_date) AS late
FROM dm_project p,
dm_calendar c
WHERE
-- PROJECTS OUT OF TIME
NVL ( p.project_due_date, c.day ) < NVL ( p.project_complete_date, c.day + 1 )
AND c.day = TRUNC ( c.day, 'MONTH' )
AND TRUNC ( p.project_due_date (+), 'MONTH' ) = TRUNC ( c.day, 'MONTH' )
AND c.day >= '01-JAN-06'
AND c.day <= '31-DEC-06'
GROUP BY TRUNC ( c.day, 'MONTH' )
ORDER BY TRUNC ( c.day, 'MONTH' )
Gives output:
==========
LINK PERIOD LATE
- JANUARY 0
- FEBRUARY 0
- MARCH 0
- APRIL 0
- MAY 0
- JUNE 0
- JULY 0
- AUGUST 0
- SEPTEMBER 0
- OCTOBER 0
- NOVEMBER 2
- DECEMBER 1
Query 2
=======
SELECT NULL AS link,
TO_CHAR ( TRUNC ( c.day, 'MONTH' ), 'MONTH' ) AS period,
COUNT(p.project_complete_date) AS late
FROM dm_project p,
dm_calendar c
WHERE
-- PROJECTS ON TIME
NVL ( p.project_complete_date, c.day ) < NVL ( p.project_due_date, c.day + 1 )
AND c.day = TRUNC ( c.day, 'MONTH' )
AND TRUNC ( p.project_due_date (+), 'MONTH' ) = TRUNC ( c.day, 'MONTH' )
AND c.day >= '01-JAN-06'
AND c.day <= '31-DEC-06'
GROUP BY TRUNC ( c.day, 'MONTH' )
ORDER BY TRUNC ( c.day, 'MONTH' )
Gives output
=========
LINK PERIOD LATE
- JANUARY 0
- FEBRUARY 0
- MARCH 0
- APRIL 0
- MAY 0
- JUNE 0
- JULY 0
- AUGUST 0
- SEPTEMBER 0
- OCTOBER 0
- NOVEMBER 1
- DECEMBER 1
Can anyone tells me why I am not able to simply display both series on a stacked bar graph?
Message was edited by:
padmocho