number of errors=0
number of warnings=0
country=FR
Group=chkGrpPostalCode
select distinct admincode1,admincode2,adminname2 from zip_code where countrycode in ('FR') and admincode1 || admincode2 in (select admincode1 || admincode2 from (select distinct admincode1,admincode2,adminname2 from zip_code where countrycode in ('FR')) t group by admincode1,admincode2 having count(*)>1) order by admincode1,admincode2
http://www.laposte.fr/Particulier/Utiliser-nos-outils-pratiques/Outils-et-documents/Trouvez-un-code-postal
admincode1 admincode2 adminname2