Selection QUERY - duplicits

Discussion created by johancz on May 3, 2011
Latest reply on Feb 20, 2012 by guillaumebarreau
My problem with selection query is (I hope) simple:
How can I select by attributes polygons, that have same value in a column: E.G.
I´ve got layer of polygon cities, and some of them are multipart, but still do have the same value in the column "CODE". I want to select those with the same "CODE" value. Thank you for answer,
JOHN, Geography and cartography student, Prague