making a join case sensitive

A

Amy H.

I am trying to run a query but getting duplicates because
it is not currently case sensitive. Sample data is the
following -

00130000001R73X
00130000001R73x

Access is seeing the x's as being the same but I need
them to be seen as two different things. I am joining two
columns that have these values. How do I accomplish this?
 
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