I would modify as follows
set query destination into a variable 
query table
check variable

You might also query with array

distinct values. If records in selection count = query with array count and 
distinct values count also equals, you have only one record each



Regards
Chuck
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> On Sep 21, 2016, at 4:44 PM, Chip Scheide <4d_o...@pghrepository.org> wrote:
> 
> 
> Query([table][table]index_Field=value)
> or
> use set
> Query selection([table];[table]Indexed_field=value)

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