unique admin name2 for BD

number of errors=0
number of warnings=0
country=BD
Group=chkGrpPostalCode

select distinct admincode1,admincode2,adminname2 from zip_code where countrycode in ('BD') and admincode1 || admincode2 in (select admincode1 || admincode2 from (select distinct admincode1,admincode2,adminname2 from zip_code where countrycode in ('BD')) t group by admincode1,admincode2 having count(*)>1) order by admincode1,admincode2

http://www.bangladeshpost.gov.bd/PostCode.asp

admincode1	admincode2	adminname2