Vælg antal / dubletter

SELECT City, Count(City) As theCount
FROM (Select City, State From tblCityStateZips Group By City, State) As C
GROUP By City
HAVING COUNT Count(City) > 1

Dette ville returnere alle byer, med optælling, der var indeholdt i mere end én stat.

Greenville 39
Greenwood 2
GreenBriar 3
osv.