Ranking Performance

Question

I need a Discoverer workbook/worksheet showing the top 15 airlines in terms of passenger count. More specifically, the top 15 are each listed in the report with their respective percentage share (highest to lowest) and any count less then 15 are totaled as the last line.
Am fairly new in Discoverer report development and any help will be highly appreciated. Thanks.

Answer 1

Hi Ned
This is possible but we have to use some rather clever calculations. Let me give you an example based on Airline and Count.
1. Create a table worksheet that has Airline and Count and sort the rows high to low based on Count
2. Create a ranking calculation that looks like this:
RANK() OVER(ORDER BY Count DESC)
3. Create a calculation called Grand Total that looks like this:
SUM(Count SUM) OVER(ORDER BY Count SUM DESC RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING )/15
4. Create a calculation called Remainder that looks like this:
Grand Total-Count SUM
5. Create a total on Count using SUM, give this total the label Totals
6. Create a total on Grand Total using Cell SUM, assign no label to this total
7. Create a total on Remainder using Cell SUM, also assign no label to this total
8. Format the data in both Grand Total and Remainder so that the background color is the same as the foreground color. This effectively hides the intermediate values leaving just a single row at the bottom containing the Total Count for the 15 airlines, a Total for all airlines, and a total for the difference between all airlines and the 15 selected in the ranking
It is too hard a task for me to explain what each step does but try it out and you will be amazed at what Discoverer can do.
For anybody else reading this with interest, an example like this will be included in the advanced calculations section of my upcoming Discoverer 10g Handbook which is due for publication at the end of the year. Advanced sales are being taken on Amazon right now.
I also offer end user and adminsitrator training where users are taught how to handle advanced calculations like this.
Best wishes
Michael Armstrong-Smith
Armstrong-Smith Consulting