selection of a query

i guru 

I would like to create a  new fields from a selection field in a query report , example:

• in selection of a query , i have the limit date of the inventary (variable data at every launch) ==> in this example <= 31.12.2015
• i would like create a new fields, for every record, whit the date 31.12.2015 present in the selection data

it's possible?

thanks in advance