select distinct substring(name,1,1) from stamps ,np_master where year(stamps.issue_date)=1988 and month(issue_date)=5 and dayofmonth(stamps.issue_date)=31 and np_master.np_code=stamps.np_code and np_master.np='R' and stamps.serial_no='1318' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1988 >> month >> May >> day >> 31 >> Currency >> R >> Serial Number >> 1318 >> Alpha >> L >>