number of errors=0
number of warnings=0
country=PL
Group=chkGrpPostalCode
select distinct admincode1,admincode2,adminname2 from zip_code where countrycode in ('PL') and admincode1 || admincode2 in (select admincode1 || admincode2 from (select distinct admincode1,admincode2,adminname2 from zip_code where countrycode in ('PL')) t group by admincode1,admincode2 having count(*)>1) order by admincode1,admincode2
admincode1 admincode2 adminname2