select distinct substring(name,1,1) from stamps ,np_master where year(stamps.issue_date)=1974 and month(issue_date)=7 and np_master.np_code=stamps.np_code and np_master.np='R' and stamps.serial_no='0718' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1974 >> month >> July >> Currency >> R >> Serial Number >> 0718 >> Alpha >> M >>