Pipeline - extract distinct values from table.

Hello,

I have Positions table in my app. In each position user should fulfill the email field of user assigned to this position. Now I'd like to extract all emails I have in this table  to csv file. I'd like to do it automatically. I found a way to achieve it with pipeline. 
Currently I am extracting all records so all emails.
I don't need duplicated emails, I mean when xx@email.com is assigned to 3 positions I need this email only once.

Is there a way to search only for distinct emails in Search Records step or in any other?

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Piotr Kryszkiewicz
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