select distinct substring(name,1,1) from stamps ,printsize_master where year(stamps.issue_date)=1979 and month(issue_date)=3 and printsize_master.printsize_code=stamps.printsize_code and printsize_master.printsize='3.55 X 2.5' and stamps.serial_no='0911' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1979 >> month >> March >> Print Size >> 3.55 X 2.5 >> Serial Number >> 0911 >> Alpha >> I >>