einsteint

q = load "stack_overflow_dataset";
q = filter q by date('creation_date_Year', 'creation_date_Month', 'creation_date_Day') in ["current month".."current month"];
result = group q by 'creation_date_Day';
result = foreach result generate q.'creation_date_Day' as 'creation_date_Day', unique(q.'questionid') as 'A';
u = load "stack_overflow_dataset";
u = filter u by date('creation_date_Year', 'creation_date_Month', 'creation_date_Day') in ["1 year ago".."current month - 1 year"];
u = foreach u generate u.'creation_date_Day' as 'creation_date_Day', unique(u.'questionid') as 'B';
final_result =cogroup result by 'creation_date_Day' left,u by 'creation_date_Day';
final_result=foreach final_result generate result.'creation_date_Day' as 'Day',sum(result.'A') as 'Current_Year',coalesce(sum(u.'B'),0) as 'Previous_Year';