Pie Chart with 0% entries

Question

I have a chart region on a page which is of type pie.
my pie chart displays entries which account for 0% of the pie. I manually calculated these % and they are 0.003665056,0.002094318,0.001832528... is there a way of displaying the % value as 3 or 4 decimal places instead of 1?
my chart is based on the following sql
SELECT NULL link,
stream_id,
SUM(total_docs)as sumdocs
FROM o2_total_docs_view
where time_stamp BETWEEN to_date(V('P36_FROM_DATE'),'DD-MON-YY HH24:MI')
AND
to_date(V('P36_TO_DATE'),'DD-MON-YY HH24:MI')
Thanks
Tom

Answer 1

Hi Tom,
Sorry about that - completely missed the bit about it being the percentage rather than the actual value.
I think that you have two choices - you can round the numbers up and add the actual values to the label, or just add the values to the label (as choice 2 above).
To round the numbers, you'd need to know the percentages before the chart is drawn. Something like the following would do this:
SELECT stream_id label,
null link,
total_docs_sum / (SUM(total_docs_sum) OVER ()) AS item_percentage
FROM (select stream_id, sum(total_docs) total_docs_sum
FROM o2_total_docs_view
where time_stamp BETWEEN to_date(V('P36_FROM_DATE'),'DD-MON-YY HH24:MI')
AND to_date(V('P36_TO_DATE'),'DD-MON-YY HH24:MI'
GROUP BY stream_id)) ZZZ
You can then wrap this within another select statement and adjust the "item_percentage" values as required. Of course, this will slightly change the percentages in the result that is used to draw the chart, but as the values are small this shouldn't be obvious to the user. You should probably still add the actual value to the label either way.
Regards
Andy