Hello,
In my requirement, I've to show Top N records from a table using Graphical Calculation View as Calc View is good in performance for handling huge amount of data. Here, 'N' can vary depends on user's input.
I tried using Rank Node available in the calculation view. But it ranks for a each and every particular data set and returning top N records of each data set. But it doesn't gives Top N from overall data set.
For Ex: suppose consider following example:
| Year | Customer ID | Value |
|---|---|---|
| 2014 | 101 | 10 |
| 2014 | 102 | 20 |
| 2014 | 103 | 30 |
| 2015 | 101 | 15 |
| 2015 | 102 | 25 |
| 2015 | 103 | 35 |
| 2014 | 103 | 60 |
Suppose if I've to get top 2 records, following should be the result:
Year Value
2014 60
2015 35
But I get the following result after using rank node:
Year Value
2014 60
2014 30
2015 35
2015 25
I used Threshold as 2, Order By: Value, Partition By Column: Year in my Graphical Calculation View.
How can we get the following result(to show top N records):
Year Value
2014 60
2015 35
Using a Graphical calculation view.
Also, what I observed by using a Rank node in a calc view is, it's taking too much time for calculation and to display the result.
Is it possible to get Top N records using Rank node in calculation view? Please suggest.
with Regards,
Antony Jerald.