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Unique select statement

Last Modified: 2012-05-11
I have a table with 3 columns

afsid     afsSource    afsSourceDetail

afsid is UID (int)
afsSource is a varchar(12) column and can be duplicated

afsSourceDetail is a status code column

What I need is to find all cases in my table where afsSource exists once and afsSourceDetail <> 'ALL'
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