Incorrect syntax near 'SELECT (month(bill_date) & ', ' & ...

Question

 how to change access query to sql server 2012

 

 

("SELECT (month(bill_date) & ', ' & year(bill_date)) AS dt, " & _

"count(1) AS nbills, sum(amount) AS tamt, sum(iif(chk_free=1,amount,0)) AS pamt, " & _

"tamt-pamt AS totamt From rec_all Where iif(rec_ref is null,0,rec_ref)<>1 and rw = 0 and bill_date " & _

"between '" & Format(DTfrom(0).Value, "yyyy/mm/dd") & "' and '" & Format(DTfrom(1).Value, "yyyy/mm/dd") & "' and co_code='" & CoCode & "'" & _

"GROUP BY year(bill_date), month(bill_date)")