+ Start a Discussion
Bruno V.Bruno V. 

Super Badge - Einstein Analytics e Discovery Insights - Challenge 1

Hi Devs! 


I'm a new adventurer in Salesforce and I don't have so much knowledge in developing. So I'm learning about Einstein Analytics and it is my first Superbadge in Trailhead.
I did the previous requires perfectly, like upload files and organize my org, so my question is:
- The first challenge says to do a graph that shows a churn rate (like a image below), but I cannot undertand how to do this formula. I need to do this using SAQL? Can you help me showing how I proceed to do this graph?

Thanks for help! I'm beginner in Salesforce World and I need to get knowledge in this great software!
Formula
SandhyaSandhya (Salesforce Developers) 
Hi,

Follow below steps.

1.Load the dataset into q
filter q into a new stream (cancellations) by Churn (you want the number of cancellations, so set the churn bit appropriately)
2.Group cancellations by ChurnDate year/quarter but project the date as ActivityDate year/quarter; count() as current quarter cancellations, 
3.you then need to lag cancellations by one period, so generate again but this time collect 'cancellations' by sum and in a separate column, include a window function with sum to pick up the prior period.  I won't tell you have to do it, but read up on windowing
4.group q by Subscription_Date  year/quarter
5.generate a count() for "subscribers" and like above, project subscription_date year/quarter as ActiviityDate year/quarter.
6.re-generate the stream from step 6 as a sum of "subscribers" and add lagged subscribers by the same windowing sum that you did for cancelllations.
7.then you can either cogroup with a full join on ActivityDate year/quarter (and then generate the formula you need) or union and regroup by ActivityDate year/quarter.

Refer below thread for similar discussion.

https://developer.salesforce.com/forums/?id=9062I000000g5xRQAQ
 
Please mark it as solved if my reply was helpful. It will make it available for other as the proper solution.
                                             
Best Regards
Sandhya
Emilien Guichard 40Emilien Guichard 40
Hi Bruno,

here is the ode I used :
 
q = load "Beattie_Subs";

cancel = group q by ('Churn_Date_Year', 'Churn_Date_Quarter');
cancel = foreach cancel generate cancel.'Churn_Date_Year' + "~~~" + cancel.'Churn_Date_Quarter' as 'ActivityDate_Year~~~ActivityDate_Quarter', count() as 'New Quarter Cancellations';

cancel = group cancel by ('ActivityDate_Year~~~ActivityDate_Quarter');
cancel = foreach cancel generate cancel.'ActivityDate_Year~~~ActivityDate_Quarter' as 'ActivityDate_Year~~~ActivityDate_Quarter', coalesce(sum(cancel.'New Quarter Cancellations'),0) as 'New Quarter Cancellations', coalesce(sum(sum('New Quarter Cancellations')) over ([-1..-1] partition by all order by ('ActivityDate_Year~~~ActivityDate_Quarter')),0) as 'Previous Quarter Cancellations';

sub = group q by ('Subscription_Date_Year', 'Subscription_Date_Quarter');
sub = foreach sub generate sub.'Subscription_Date_Year' + "~~~" + sub.'Subscription_Date_Quarter' as 'ActivityDate_Year~~~ActivityDate_Quarter', count() as 'New Quarter Subcribers';

sub = group sub by ('ActivityDate_Year~~~ActivityDate_Quarter');
sub = foreach sub generate sub.'ActivityDate_Year~~~ActivityDate_Quarter' as 'ActivityDate_Year~~~ActivityDate_Quarter', coalesce(sum(sub.'New Quarter Subcribers'),0) as 'New Quarter Subcribers', coalesce(sum(sum('New Quarter Subcribers')) over ([-1..0] partition by all order by ('ActivityDate_Year~~~ActivityDate_Quarter')),0) as 'Previous Quarter Subcribers';

result = cogroup sub by 'ActivityDate_Year~~~ActivityDate_Quarter' full, cancel by 'ActivityDate_Year~~~ActivityDate_Quarter';
result = foreach result generate coalesce(sub.'ActivityDate_Year~~~ActivityDate_Quarter', cancel.'ActivityDate_Year~~~ActivityDate_Quarter') as 'ActivityDate_Year~~~ActivityDate_Quarter', sum(cancel.'New Quarter Cancellations')/(sum(sub.'New Quarter Subcribers') + sum(sub.'Previous Quarter Subcribers') - sum(cancel.'Previous Quarter Cancellations')) as 'Churn Rate';

 
NI7NI7
@ Linthaw @all

Hi ,
I'm experiencing this error in step 1:
Challenge Not yet complete... here's what's wrong: 
We can't find the result on your chart or the wrong quarter was identified. Confirm a marker was added to your chart.

dashboard pic



q = load "Beattie_Subs";

cancel = group q by ('Churn_Date_Year', 'Churn_Date_Quarter');
cancel = foreach cancel generate cancel.'Churn_Date_Year' + "~~~" + cancel.'Churn_Date_Quarter' as 'ActivityDate_Year~~~ActivityDate_Quarter', count() as 'New Quarter Cancellations';

cancel = group cancel by ('ActivityDate_Year~~~ActivityDate_Quarter');
cancel = foreach cancel generate cancel.'ActivityDate_Year~~~ActivityDate_Quarter' as 'ActivityDate_Year~~~ActivityDate_Quarter', coalesce(sum(cancel.'New Quarter Cancellations'),0) as 'New Quarter Cancellations', coalesce(sum(sum('New Quarter Cancellations')) over ([..-1] partition by all order by ('ActivityDate_Year~~~ActivityDate_Quarter')),-1) as 'Previous Quarter Cancellations';

sub = group q by ('Subscription_Date_Year', 'Subscription_Date_Quarter');
sub = foreach sub generate sub.'Subscription_Date_Year' + "~~~" + sub.'Subscription_Date_Quarter' as 'ActivityDate_Year~~~ActivityDate_Quarter', count() as 'New Quarter Subcribers';

sub = group sub by ('ActivityDate_Year~~~ActivityDate_Quarter');
sub = foreach sub generate sub.'ActivityDate_Year~~~ActivityDate_Quarter' as 'ActivityDate_Year~~~ActivityDate_Quarter', coalesce(sum(sub.'New Quarter Subcribers'),0) as 'New Quarter Subcribers', coalesce(sum(sum('New Quarter Subcribers')) over ([..-1] partition by all order by ('ActivityDate_Year~~~ActivityDate_Quarter')),0) as 'Previous Quarter Subcribers';

result = cogroup sub by 'ActivityDate_Year~~~ActivityDate_Quarter' full, cancel by 'ActivityDate_Year~~~ActivityDate_Quarter';
result = foreach result generate coalesce(sub.'ActivityDate_Year~~~ActivityDate_Quarter', cancel.'ActivityDate_Year~~~ActivityDate_Quarter') as 'ActivityDate_Year~~~ActivityDate_Quarter', (sum(cancel.'New Quarter Cancellations')/(sum(sub.'New Quarter Subcribers') + sum(sub.'Previous Quarter Subcribers') - sum(cancel.'Previous Quarter Cancellations')))*100 as 'Churn Rate';
NI7NI7
Chart marker was the issue. I was able to complete after adding it. Thank you
 
Md. Abdur Razzak.Md. Abdur Razzak.
q = load "Beattie_Subs";

--new cancellations grouping and calculations
cancel_1 = group q 
    by (
        'Churn_Date_Year',
        'Churn_Date_Quarter'
    );
    
cancel_1 = foreach cancel_1 
    generate 
        cancel_1.'Churn_Date_Year' + " - " + cancel_1.'Churn_Date_Quarter' as 'Cancellation Activity', 
        count() as 'Current Quarter Cancellations';

--previous cancellations calculations with (current cancellations)
cancel_2 = group cancel_1 
    by ('Cancellation Activity');
    
cancel_2 = foreach cancel_2 
    generate 
        cancel_2.'Cancellation Activity' as 'Cancellation Activity', 
        coalesce(
            sum(cancel_2.'Current Quarter Cancellations'),
                0
            ) as 'Current Quarter Cancellations',  
        coalesce(
            sum(sum('Current Quarter Cancellations')) 
            over(
                [-1..-1] 
                partition by all 
                order by ('Cancellation Activity')
            ),
            0
        ) as 'Previous Quarter Cancellations';


--new subscribers grouping and calculations
sub_1 = group q 
    by (
        'Subscription_Date_Year',
        'Subscription_Date_Quarter'
    );
    
sub_1 = foreach sub_1 
    generate 
        sub_1.'Subscription_Date_Year' + " - " + sub_1.'Subscription_Date_Quarter' as 'Subscriber Activity', 
        count() as 'New Quarter Subcribers';

--previous subscribers calculations with (current subscribers)
sub_2 = group sub_1 
    by ('Subscriber Activity');
    
sub_2 = foreach sub_2 
    generate 
        sub_2.'Subscriber Activity' as 'Subscriber Activity', 
        coalesce(
            sum(sub_2.'New Quarter Subcribers'),
                0
            ) as 'New Quarter Subcribers',  
        coalesce(
            sum(sum('New Quarter Subcribers')) 
            over(
                [-1..0] 
                partition by all 
                order by ('Subscriber Activity')
            ),
            0
        ) as 'Previous Quarter Subcribers';

--calculating rating
result = cogroup 
    sub_2 by 'Subscriber Activity' full, 
    cancel_2 by 'Cancellation Activity';
    
result = foreach result 
    generate 
        coalesce(
            sub_2.'Subscriber Activity', 
            cancel_2.'Cancellation Activity'
        ) as 'Subscriber Activity', 
        sum(cancel_2.'Current Quarter Cancellations') / 
        (
            sum(sub_2.'New Quarter Subcribers') + 
            sum(sub_2.'Previous Quarter Subcribers') - 
            sum(cancel_2.'Previous Quarter Cancellations')
        ) as 'Churn Rate';
    

--after adding it to the dashboard add a cart marker to the first quarter point