How to select DISTINCT(CONCAT(??? in the 'fields to retrieve' section

Hi
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I want to use

DISTINCT(CONCAT(mdlPublishedTerms.intYear,mdlPublishedTerms.txtTerm)):mdlPublishedTerms.publishedTerm

in a db read 'Fields to retrieve' section.
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Or better still in select only records where CONCAT(mdlPublishedTerms.intYear,mdlPublishedTerms.txtTerm) is distinct
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Any suggestions gratefully received.
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Regards
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Nick

Ye gods! That easy! Many thanks. My question is - how did you know that? Is there some general rule that I am missing??
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Regards
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Nick

from a glance at a forum post a year ago.

Pushing a bit further - how can I set up WHERE to seelct records with the same id as a previous read??

mdlConvenersInfo.id/IN: ( {var:read_data96.mdlConveners})

That mdlConveners looks like this

[array] 0 [array] mdlConveners [string] user_id = "587" [array] 1 [array] mdlConveners [string] user_id = "600" [array] 2 [array] mdlConveners [string] user_id = "605"

I have a feeling that mdlConveners is wrong for the purpose.
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Regards
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Nick

mdlConvenersInfo.id/IN:{var:read_data96.model.field}

Should do it