Create calc as [first letter]
Create parameter and string and list add [first letter]
Create 2nd calc as [Selected and others]
if [Calculation1]=[Select Name First letter] then [Customer Name] else "Others" end
Drag this calc into row and show parameter control and select letters.
Create new calc as [selected count and others]
if [Calculation1]=[Select Name First letter] then "Selected" else "Others" end
Drag this [selected count and others] into row and drag customer name into text and select count.
now we can get selected and other count and also selected customers and others data in view.
Retrieving data ...