I am using the following expression for to fetch multiple values from the filter (months)
concat(distinct text(Date(Date#(if($(exit_month)=12,$(exit_month)-9,$(exit_month)+3),'MM'),'MMM')),',')
where exit_month is used to compute the last month month from months filter. The expression for exit_month is as follows:
max((If(num(month(date#(Mon,'MMM')))<4,num(month(date#(Mon,'MMM')))+9,
num(month(date#(Mon,'MMM')))-3)),'MM')
The exit_month expression works fine independently but does not work with concat( distinct..
