Count unique records

[#1]

Hello,
this is an example of what I need.

I need to count the first time that a concrete ID appears. If an ID appears twice I only want it to be counted once.

Can you help me?

thanks

[swuehl]

Sorry, it's absolutely unclear to me looking at your description and the qvw what you are trying to achieve. Please describe your requirements a bit more detailed, best with some sample results you want to obtain from your data set.

[vardhancse]

if you want only unique id count add expression similar to below:

Count(Distinct(ID))