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Hi Uli,
No, in an Analysis, each row or line is calculated separately (as it can be multi-threaded). So you cannot use window functions in an Analysis.
You should use a SQL, Python or R recipe to do that.
(Similarly to the sorting.)
We have on the roadmap a Window recipe (similar to the Grouping recipe) that will work on datasets managed by SQL databases supporting such functions (PostgreSQL, etc.).
I hope that helps,
Jeremy