select distinct substring(name,1,1) from stamps ,printsize_master,np_master where year(stamps.issue_date)=1990 and month(issue_date)=12 and np_master.np_code=stamps.np_code and np_master.np='R' and printsize_master.printsize_code=stamps.printsize_code and printsize_master.printsize='3.55 X 2.5' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1990 >> month >> December >> Currency >> R >> Print Size >> 3.55 X 2.5 >> Alpha >> B >>