Syntax for the set analysis

[Praveen11]

I'm new to Qlik So please help me.

I want to show sales data for this quarter till date in front end. I need  to write this in  set analysis.

Can someone Share  the logic for this   

[BrunPierre]

As below.

Sum({$<SalesDate={">=$(=QuarterStart(Max(SalesDate)))<=$(=Max(SalesDate))"}>} SalesAmount)

or

Sum({$<SalesDate={">=$(=QuarterStart(Today()))<=$(=Today())"}>} SalesAmount)