number of errors=0
number of warnings=0
country=FR
Group=chkGrpPostalCode
select distinct admincode1,admincode2,admincode3,adminname3 from zip_code where countrycode in ('FR') and admincode1 || admincode2 || admincode3 in (select admincode1 || admincode2 || admincode3 from (select distinct admincode1,admincode2,admincode3,adminname3 from zip_code where countrycode in ('FR')) t group by admincode1,admincode2,admincode3 having count(*)>1) order by admincode1,admincode2,admincode3
http://www.laposte.fr/Particulier/Utiliser-nos-outils-pratiques/Outils-et-documents/Trouvez-un-code-postal
admincode1 admincode2 admincode3 adminname3