select distinct substring(name,1,1) from stamps ,np_master where year(stamps.issue_date)=1998 and month(issue_date)=5 and stamps.serial_no='1790' and np_master.np_code=stamps.np_code and np_master.np='P' order by substring(name,1,1)
StampsIndia
Issue Date >> year >> 1998 >> month >> May >> Serial Number >> 1790 >> Currency >> P >> Alpha >> L >>