Make selection based on a set expression?

[#1]

Hi, all.

I have a column of delta counts between two types of transactions that can happen in a session.  Basically, if a transaction is attempted 3 times and succeeds 1 time, the delta column for the given transaction will show 2 (3-1 = 2).

I'm trying to add some functionality where a user can add a selection for all of the sessions that have delta > 0 by clicking a button.

Basically, I've created a button, and I believe it needs a Select In Field action.  I've included the ID field selection to be set (expecting I'm going to fill it with a list of session IDs that had one of these deltas). 

However, I'm stumped as to how to get a list of relevant IDs from a set analysis into my field selection.

Is there something like this that I can put into my button to make the selection?

SELECT({<$(=vDateAlias)={">=$(=vRangeDate1)<=$(=vRangeDate2)"}, delta_total={>0}>} [session_id]) //Would produce a list of IDs in the current selection that have a delta_total dimension greater than zero.

Thanks!

[Anonymous]

Hello, Eric.

Do you really need the selection to be on session_id? If the selection is made on delta_total, the resulting subset will be the same. If you decide to select on delta_total, the search string is as simple as >0 .

If you really want to select session_id, try this:

='(' & Concat(Distinct {<$(=vDateAlias)={">=$(=vRangeDate1)<=$(=vRangeDate2)"}, delta_total={>0}>} [session_id]), '|') & ')

Regards.'