hello *,

i am constructing a rather longish join where i want to select distinct 
rows only. however, i know that the join-rows i collect are distinct 
within the first two columns (it's a primary key of one of the join 
partners). many more columns are selected.

question: can the optimizer tell how much of the query result to test 
for distinctness ? can i help by providing the information to the 
optimizer ?

thanks for any advice,
        Raimund

-- 
Raimund Jacob
                                                  \|/ ____ \|/
Pinuts Media+Science GmbH                        "@'/ ,. \`@"
Potsdamer Str. 96                                /_| \__/ |_\
D-10785 Berlin                                      \__U_/
http://www.pinuts.de/ voice: +49 30 590090313 fax: +49 30 590090390

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