Stacked Bar Chart with Multiple Series Sort Question

Question

Hi,
Apex version 4.1.1
I have a stacked bar chart with three separate series, one showing customer effort, another showing project effort and the third showing other effort, summarized by calendar week. The x-axis of the chart is the calendar "week of" date, and the y-axis has a bar for each of the three series. Not every type of effort occurs every week.
When AnyChart renders the chart, the order of entries on the x-axis seems to be dependent both on which series are present in a given week as well as the "week of" date. Weeks with all three series sort in order by calendar date, followed by weeks where just the 2nd & 3rd series are present, followed by weeks where just the 3rd series is present. See this [url http://tinypic.com/r/b9zdt/6] picture of the chart  noting the "week of" dates. Note that the months go Sep-Oct-Nov-Aug-Oct.
Is there a way to force AnyChart to sort the x-axis in chronological order regardless of whether there is data for all three series for a given week? I have looked through the AnyChart XML reference but cannot find a way to do this.
Incidentally, I can solve the sorting problem by combining all three series into a single query:
select
  null as link,
  week_of as label,
  sum(customer_effort) as "Customer Effort",
  sum(project_effort) as "Project Effort",
  sum(other_effort) as "Training, Admin and Other Effort"
from ...But if I do this, I cannot figure out how to have each bar on a given week link to a different detail page, e.g., if I click on a bar representing customer effort I want to link to one page, but if I click on a bar representing project effort, I want to link to a different page. I have had a look at the [url http://apex.oracle.com/pls/apex/f?p=36648:59:1570983160946101::NO:::] chart examples  posted on apex.oracle.com, but cannot figure out how to apply to multiple series in a single query.
Thanks,
Mike

Answer 1

Thanks, Jeff. I did try this but for whatever reason it doesn't make a difference. I think it is because if there's no data for a given series for a certain week, there is no entry in the data set that is sent to AnyChart.
I was able to get around the issue by "filling in" the missing weeks from each data series. To generate the list of "Week Of" dates for a given date range, I used this code:
select
     trunc (each_day) as week_of,
     0 as effort
from (
     select
          (to_date(:p920_start_date,:app_date_format) + 2 - to_char(to_date(:p920_start_date,:app_date_format),'D') - 1) + level each_day
     from dual
     connect by level <= to_date(:p920_end_date,:app_date_format) - to_date(:p920_start_date,:app_date_format) + 1
where
     to_char (each_day, 'D') = '2'This creates an effort entry of 0 for each week within the date range; I use the Monday date of a week as the "Week Of" date. I then union this with my actual data and summarize by week and viola, I get the weeks in order. This also has the benefit of showing a week for which there are no entries in any of the three series.
Thanks for taking a look at this.
Mike