number of errors=0
number of warnings=0
country=DE
Group=chkGrpPostalCode
select distinct admincode1,admincode2,admincode3,admincode4,adminname4 from zip_code where countrycode in ('DE') and admincode1 || admincode2 || admincode3|| admincode4 in (select admincode1 || admincode2 || admincode3|| admincode4 from (select distinct admincode1,admincode2,admincode3,admincode4,adminname4 from zip_code where countrycode in ('DE')) t group by admincode1,admincode2,admincode3,admincode4 having count(*)>1) order by admincode1,admincode2,admincode3,admincode4
http://www.deutschepost.de/plzsuche/
admincode1 admincode2 admincode3 admincode4 adminname4