Standarddeviation of distinct values?

Standarddeviation of distinct values?

Hey there,

I want to get the average days between orders of a customer.

stddev(days_between("Due_Date"))

works just fine. However, some customers have multiple orders on the same day. Is it possible to only include the distinct values in the calculation?

stddev(distinct days_between("Due_Date"))

doesn't work in Zoho.


Thanks in advance!