convert db2 to sql server

can nay one help me how to convert following db2 query to sql server

select AO_CARDHDR_NO||' '||AO_MERCHANT_ID||'  '||AO_REQUEST_DATE||'  '||AO_BILLING_AMT||'  '||AO_APPROVAL_CD,

count(AO_CARDHDR_NO||' '||AO_MERCHANT_ID||'  '||AO_REQUEST_DATE||'  '||AO_BILLING_AMT||'  '||AO_APPROVAL_CD)

from cp_aponus

where

AO_RESPONSE_CD='00'

and (integer(months_between(to_date(current date,'YYYYMMDD'),to_date(AO_REQUEST_DATE,'YYYYMMDD'))*30) >=1

and integer(months_between(to_date(current date,'YYYYMMDD'),to_date(AO_REQUEST_DATE,'YYYYMMDD'))*30)<=90)

group by AO_CARDHDR_NO||' '||AO_MERCHANT_ID||'  '||AO_REQUEST_DATE||'  '||AO_BILLING_AMT||'  '||AO_APPROVAL_CD

having count(AO_CARDHDR_NO||' '||AO_MERCHANT_ID||'  '||AO_REQUEST_DATE||'  '||AO_BILLING_AMT||'  '||AO_APPROVAL_CD) >1